/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:37:56,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:37:56,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:37:56,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 19:37:56,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 19:37:56,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 19:37:56,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 19:37:56,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 19:37:56,840 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 19:37:56,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 19:37:56,842 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 19:37:56,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 19:37:56,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:37:56,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:37:56,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:37:56,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:37:56,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:37:56,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:37:56,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:37:56,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:37:56,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:37:56,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:37:56,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:37:56,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:37:56,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-13 19:37:56,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-13 19:37:56,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-13 19:37:56,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-13 19:37:56,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-13 19:37:56,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-13 19:37:56,859 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-13 19:37:56,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-13 19:37:56,873 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-13 19:37:56,875 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-13 19:37:56,876 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-13 19:37:56,876 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-13 19:37:56,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-13 19:37:56,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-13 19:37:56,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 19:37:56,879 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 19:37:56,880 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 19:37:56,884 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:37:56,919 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:37:56,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:37:56,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:37:56,919 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:37:56,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:37:56,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:37:56,921 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:37:56,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:37:56,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:37:56,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:37:56,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:37:56,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:37:56,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:37:56,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:37:56,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:37:56,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:37:56,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:37:56,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:37:56,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:37:56,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:37:57,190 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:37:57,206 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:37:57,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:37:57,210 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:37:57,215 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:37:57,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl [2021-07-13 19:37:57,216 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/name-comparator-subst.wvr.bpl' [2021-07-13 19:37:57,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:37:57,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:37:57,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:37:57,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:37:57,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:37:57,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:37:57,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:37:57,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:37:57,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:37:57,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... [2021-07-13 19:37:57,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:37:57,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:37:57,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:37:57,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:37:57,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:37:57,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:37:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:37:57,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:37:57,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:37:57,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:37:57,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:37:57,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:37:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:37:57,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:37:57,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:37:57,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:37:57,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:37:57,428 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:37:57,865 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:37:57,866 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-13 19:37:57,867 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:37:57 BoogieIcfgContainer [2021-07-13 19:37:57,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:37:57,869 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:37:57,869 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:37:57,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:37:57,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:37:57" (1/2) ... [2021-07-13 19:37:57,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e78531 and model type name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:37:57, skipping insertion in model container [2021-07-13 19:37:57,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:37:57" (2/2) ... [2021-07-13 19:37:57,873 INFO L111 eAbstractionObserver]: Analyzing ICFG name-comparator-subst.wvr.bpl [2021-07-13 19:37:57,882 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:37:57,884 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:37:57,884 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:37:57,885 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:37:57,932 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:37:57,958 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:37:57,974 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:37:57,974 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:37:57,974 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:37:57,976 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:37:57,976 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:37:57,977 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:37:57,980 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:37:57,980 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:37:57,990 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-07-13 19:37:58,023 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:37:58,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:58,037 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:58,038 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:58,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:58,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1690757270, now seen corresponding path program 1 times [2021-07-13 19:37:58,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:58,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896455068] [2021-07-13 19:37:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:58,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:58,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896455068] [2021-07-13 19:37:58,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896455068] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:37:58,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:37:58,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:37:58,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777798097] [2021-07-13 19:37:58,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:37:58,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:58,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:37:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:37:58,334 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:58,659 INFO L93 Difference]: Finished difference Result 399 states and 1111 transitions. [2021-07-13 19:37:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:37:58,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:37:58,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:58,673 INFO L225 Difference]: With dead ends: 399 [2021-07-13 19:37:58,673 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:37:58,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:37:58,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:37:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 147. [2021-07-13 19:37:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.863013698630137) internal successors, (418), 146 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:58,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 418 transitions. [2021-07-13 19:37:58,773 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 418 transitions. Word has length 17 [2021-07-13 19:37:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:58,773 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 418 transitions. [2021-07-13 19:37:58,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 418 transitions. [2021-07-13 19:37:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:37:58,775 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:58,775 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:58,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:37:58,776 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash 540971640, now seen corresponding path program 2 times [2021-07-13 19:37:58,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:58,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581449215] [2021-07-13 19:37:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:58,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:58,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581449215] [2021-07-13 19:37:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581449215] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:37:58,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:37:58,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:37:58,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582209290] [2021-07-13 19:37:58,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:37:58,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:37:58,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:37:58,940 INFO L87 Difference]: Start difference. First operand 147 states and 418 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:59,183 INFO L93 Difference]: Finished difference Result 375 states and 1007 transitions. [2021-07-13 19:37:59,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:37:59,183 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:37:59,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:59,187 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:37:59,187 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:37:59,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:37:59,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:37:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 171. [2021-07-13 19:37:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.864705882352941) internal successors, (487), 170 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 487 transitions. [2021-07-13 19:37:59,215 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 487 transitions. Word has length 17 [2021-07-13 19:37:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:59,215 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 487 transitions. [2021-07-13 19:37:59,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 487 transitions. [2021-07-13 19:37:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:37:59,221 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:59,221 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:59,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:37:59,221 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:59,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1605199120, now seen corresponding path program 3 times [2021-07-13 19:37:59,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:59,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858077552] [2021-07-13 19:37:59,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:59,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858077552] [2021-07-13 19:37:59,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858077552] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:37:59,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:37:59,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:37:59,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904827041] [2021-07-13 19:37:59,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:37:59,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:59,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:37:59,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:37:59,339 INFO L87 Difference]: Start difference. First operand 171 states and 487 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:37:59,604 INFO L93 Difference]: Finished difference Result 358 states and 984 transitions. [2021-07-13 19:37:59,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:37:59,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:37:59,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:37:59,607 INFO L225 Difference]: With dead ends: 358 [2021-07-13 19:37:59,607 INFO L226 Difference]: Without dead ends: 336 [2021-07-13 19:37:59,608 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:37:59,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-07-13 19:37:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 180. [2021-07-13 19:37:59,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.8547486033519553) internal successors, (511), 179 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 511 transitions. [2021-07-13 19:37:59,616 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 511 transitions. Word has length 17 [2021-07-13 19:37:59,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:37:59,616 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 511 transitions. [2021-07-13 19:37:59,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:37:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 511 transitions. [2021-07-13 19:37:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:37:59,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:37:59,617 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:37:59,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:37:59,618 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:37:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:37:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1741639554, now seen corresponding path program 4 times [2021-07-13 19:37:59,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:37:59,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010251238] [2021-07-13 19:37:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:37:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:37:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:37:59,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:37:59,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010251238] [2021-07-13 19:37:59,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010251238] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:37:59,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:37:59,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:37:59,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340674311] [2021-07-13 19:37:59,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:37:59,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:37:59,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:37:59,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:37:59,786 INFO L87 Difference]: Start difference. First operand 180 states and 511 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:00,075 INFO L93 Difference]: Finished difference Result 510 states and 1384 transitions. [2021-07-13 19:38:00,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:00,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:00,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:00,079 INFO L225 Difference]: With dead ends: 510 [2021-07-13 19:38:00,079 INFO L226 Difference]: Without dead ends: 495 [2021-07-13 19:38:00,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:00,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-13 19:38:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 196. [2021-07-13 19:38:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.958974358974359) internal successors, (577), 195 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 577 transitions. [2021-07-13 19:38:00,087 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 577 transitions. Word has length 17 [2021-07-13 19:38:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:00,088 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 577 transitions. [2021-07-13 19:38:00,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 577 transitions. [2021-07-13 19:38:00,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:00,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:00,089 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:00,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:38:00,089 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:00,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:00,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1174687474, now seen corresponding path program 5 times [2021-07-13 19:38:00,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:00,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368459327] [2021-07-13 19:38:00,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:00,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:00,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368459327] [2021-07-13 19:38:00,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368459327] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:00,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:00,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:00,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539404100] [2021-07-13 19:38:00,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:00,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:00,205 INFO L87 Difference]: Start difference. First operand 196 states and 577 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:00,456 INFO L93 Difference]: Finished difference Result 464 states and 1270 transitions. [2021-07-13 19:38:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:00,457 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:00,460 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:38:00,460 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:38:00,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:38:00,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 196. [2021-07-13 19:38:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.943589743589744) internal successors, (574), 195 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 574 transitions. [2021-07-13 19:38:00,468 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 574 transitions. Word has length 17 [2021-07-13 19:38:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:00,468 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 574 transitions. [2021-07-13 19:38:00,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 574 transitions. [2021-07-13 19:38:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:00,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:00,469 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:00,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:38:00,469 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:00,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1412132048, now seen corresponding path program 6 times [2021-07-13 19:38:00,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:00,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976435096] [2021-07-13 19:38:00,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:00,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:00,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976435096] [2021-07-13 19:38:00,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976435096] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:00,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:00,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:00,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092679292] [2021-07-13 19:38:00,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:00,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:00,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:00,584 INFO L87 Difference]: Start difference. First operand 196 states and 574 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:00,894 INFO L93 Difference]: Finished difference Result 497 states and 1376 transitions. [2021-07-13 19:38:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:00,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:00,897 INFO L225 Difference]: With dead ends: 497 [2021-07-13 19:38:00,897 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:38:00,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:38:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 202. [2021-07-13 19:38:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 3.0) internal successors, (603), 201 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 603 transitions. [2021-07-13 19:38:00,905 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 603 transitions. Word has length 17 [2021-07-13 19:38:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:00,905 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 603 transitions. [2021-07-13 19:38:00,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:00,906 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 603 transitions. [2021-07-13 19:38:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:00,906 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:00,907 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:00,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:38:00,907 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:00,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:00,907 INFO L82 PathProgramCache]: Analyzing trace with hash -845179968, now seen corresponding path program 7 times [2021-07-13 19:38:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:00,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187408806] [2021-07-13 19:38:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:01,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:01,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187408806] [2021-07-13 19:38:01,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187408806] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:01,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:01,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:01,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182263842] [2021-07-13 19:38:01,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:01,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:01,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:01,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:01,013 INFO L87 Difference]: Start difference. First operand 202 states and 603 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:01,271 INFO L93 Difference]: Finished difference Result 490 states and 1348 transitions. [2021-07-13 19:38:01,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:01,272 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:01,275 INFO L225 Difference]: With dead ends: 490 [2021-07-13 19:38:01,275 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:38:01,275 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:38:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 199. [2021-07-13 19:38:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.974747474747475) internal successors, (589), 198 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 589 transitions. [2021-07-13 19:38:01,283 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 589 transitions. Word has length 17 [2021-07-13 19:38:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:01,283 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 589 transitions. [2021-07-13 19:38:01,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 589 transitions. [2021-07-13 19:38:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:01,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:01,284 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:01,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:38:01,285 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -119789648, now seen corresponding path program 8 times [2021-07-13 19:38:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563214036] [2021-07-13 19:38:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:01,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:01,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563214036] [2021-07-13 19:38:01,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563214036] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:01,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:01,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:01,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711988377] [2021-07-13 19:38:01,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:01,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:01,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:01,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:01,379 INFO L87 Difference]: Start difference. First operand 199 states and 589 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:01,637 INFO L93 Difference]: Finished difference Result 466 states and 1291 transitions. [2021-07-13 19:38:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:01,640 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:38:01,641 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:38:01,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:38:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 202. [2021-07-13 19:38:01,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.9950248756218905) internal successors, (602), 201 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 602 transitions. [2021-07-13 19:38:01,649 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 602 transitions. Word has length 17 [2021-07-13 19:38:01,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:01,649 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 602 transitions. [2021-07-13 19:38:01,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,650 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 602 transitions. [2021-07-13 19:38:01,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:01,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:01,650 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:01,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:38:01,651 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash -494987088, now seen corresponding path program 9 times [2021-07-13 19:38:01,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:01,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370427714] [2021-07-13 19:38:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:01,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:01,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370427714] [2021-07-13 19:38:01,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370427714] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:01,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:01,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:01,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289993623] [2021-07-13 19:38:01,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:01,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:01,748 INFO L87 Difference]: Start difference. First operand 202 states and 602 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:01,974 INFO L93 Difference]: Finished difference Result 460 states and 1287 transitions. [2021-07-13 19:38:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:01,977 INFO L225 Difference]: With dead ends: 460 [2021-07-13 19:38:01,977 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:38:01,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:38:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 208. [2021-07-13 19:38:01,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.9806763285024154) internal successors, (617), 207 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 617 transitions. [2021-07-13 19:38:01,985 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 617 transitions. Word has length 17 [2021-07-13 19:38:01,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:01,986 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 617 transitions. [2021-07-13 19:38:01,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:01,986 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 617 transitions. [2021-07-13 19:38:01,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:01,987 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:01,987 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:01,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:38:01,987 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash 19598974, now seen corresponding path program 10 times [2021-07-13 19:38:01,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:01,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838854223] [2021-07-13 19:38:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:02,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838854223] [2021-07-13 19:38:02,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838854223] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:02,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:02,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:02,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145102758] [2021-07-13 19:38:02,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:02,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:02,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:02,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:02,081 INFO L87 Difference]: Start difference. First operand 208 states and 617 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:02,396 INFO L93 Difference]: Finished difference Result 493 states and 1376 transitions. [2021-07-13 19:38:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:02,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:02,400 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:38:02,400 INFO L226 Difference]: Without dead ends: 478 [2021-07-13 19:38:02,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-07-13 19:38:02,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 215. [2021-07-13 19:38:02,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2021-07-13 19:38:02,409 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 17 [2021-07-13 19:38:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:02,409 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2021-07-13 19:38:02,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2021-07-13 19:38:02,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:02,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:02,410 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:02,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:38:02,410 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:02,411 INFO L82 PathProgramCache]: Analyzing trace with hash 586551054, now seen corresponding path program 11 times [2021-07-13 19:38:02,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:02,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505104244] [2021-07-13 19:38:02,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:02,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505104244] [2021-07-13 19:38:02,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505104244] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:02,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:02,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:02,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483497543] [2021-07-13 19:38:02,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:02,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:02,500 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:02,778 INFO L93 Difference]: Finished difference Result 493 states and 1363 transitions. [2021-07-13 19:38:02,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:02,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:02,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:02,781 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:38:02,782 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:38:02,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:38:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 212. [2021-07-13 19:38:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 3.0) internal successors, (633), 211 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 633 transitions. [2021-07-13 19:38:02,792 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 633 transitions. Word has length 17 [2021-07-13 19:38:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:02,792 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 633 transitions. [2021-07-13 19:38:02,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 633 transitions. [2021-07-13 19:38:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:02,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:02,793 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:02,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:38:02,794 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:02,794 INFO L82 PathProgramCache]: Analyzing trace with hash 15096248, now seen corresponding path program 12 times [2021-07-13 19:38:02,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:02,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497813490] [2021-07-13 19:38:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:02,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:02,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497813490] [2021-07-13 19:38:02,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497813490] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:02,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201324225] [2021-07-13 19:38:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:02,913 INFO L87 Difference]: Start difference. First operand 212 states and 633 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,142 INFO L93 Difference]: Finished difference Result 489 states and 1347 transitions. [2021-07-13 19:38:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,145 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:38:03,145 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:38:03,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:38:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 212. [2021-07-13 19:38:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.985781990521327) internal successors, (630), 211 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 630 transitions. [2021-07-13 19:38:03,154 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 630 transitions. Word has length 17 [2021-07-13 19:38:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,155 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 630 transitions. [2021-07-13 19:38:03,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 630 transitions. [2021-07-13 19:38:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:03,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,156 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:38:03,156 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1192892344, now seen corresponding path program 13 times [2021-07-13 19:38:03,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406732858] [2021-07-13 19:38:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:03,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406732858] [2021-07-13 19:38:03,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406732858] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:03,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:03,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:03,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50540458] [2021-07-13 19:38:03,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:03,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:03,260 INFO L87 Difference]: Start difference. First operand 212 states and 630 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,562 INFO L93 Difference]: Finished difference Result 498 states and 1397 transitions. [2021-07-13 19:38:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:03,563 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,566 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:38:03,566 INFO L226 Difference]: Without dead ends: 476 [2021-07-13 19:38:03,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-07-13 19:38:03,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 218. [2021-07-13 19:38:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 3.0276497695852536) internal successors, (657), 217 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 657 transitions. [2021-07-13 19:38:03,575 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 657 transitions. Word has length 17 [2021-07-13 19:38:03,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,575 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 657 transitions. [2021-07-13 19:38:03,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,575 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 657 transitions. [2021-07-13 19:38:03,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:03,576 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,576 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:38:03,576 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1477737184, now seen corresponding path program 14 times [2021-07-13 19:38:03,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725003927] [2021-07-13 19:38:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:03,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725003927] [2021-07-13 19:38:03,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725003927] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:03,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:03,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:03,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546279181] [2021-07-13 19:38:03,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:03,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:03,662 INFO L87 Difference]: Start difference. First operand 218 states and 657 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:03,892 INFO L93 Difference]: Finished difference Result 465 states and 1316 transitions. [2021-07-13 19:38:03,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:03,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:03,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:03,895 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:38:03,895 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:38:03,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:38:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 220. [2021-07-13 19:38:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 3.0319634703196345) internal successors, (664), 219 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 664 transitions. [2021-07-13 19:38:03,903 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 664 transitions. Word has length 17 [2021-07-13 19:38:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:03,903 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 664 transitions. [2021-07-13 19:38:03,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 664 transitions. [2021-07-13 19:38:03,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:03,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:03,904 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:03,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:38:03,904 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:03,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:03,905 INFO L82 PathProgramCache]: Analyzing trace with hash -2013826360, now seen corresponding path program 15 times [2021-07-13 19:38:03,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:03,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583030710] [2021-07-13 19:38:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:03,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:03,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:03,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583030710] [2021-07-13 19:38:03,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583030710] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:03,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:03,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:03,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794771296] [2021-07-13 19:38:03,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:03,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:03,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:03,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:03,986 INFO L87 Difference]: Start difference. First operand 220 states and 664 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,212 INFO L93 Difference]: Finished difference Result 463 states and 1301 transitions. [2021-07-13 19:38:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,214 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:38:04,215 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:38:04,215 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:04,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:38:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 222. [2021-07-13 19:38:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 3.0271493212669682) internal successors, (669), 221 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 669 transitions. [2021-07-13 19:38:04,222 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 669 transitions. Word has length 17 [2021-07-13 19:38:04,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,222 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 669 transitions. [2021-07-13 19:38:04,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 669 transitions. [2021-07-13 19:38:04,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:04,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,223 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:38:04,224 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1567844280, now seen corresponding path program 16 times [2021-07-13 19:38:04,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986744908] [2021-07-13 19:38:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:04,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986744908] [2021-07-13 19:38:04,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986744908] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:04,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:04,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755852613] [2021-07-13 19:38:04,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:04,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:04,307 INFO L87 Difference]: Start difference. First operand 222 states and 669 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,528 INFO L93 Difference]: Finished difference Result 440 states and 1234 transitions. [2021-07-13 19:38:04,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:04,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,531 INFO L225 Difference]: With dead ends: 440 [2021-07-13 19:38:04,531 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:38:04,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:38:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 224. [2021-07-13 19:38:04,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 3.0448430493273544) internal successors, (679), 223 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 679 transitions. [2021-07-13 19:38:04,539 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 679 transitions. Word has length 17 [2021-07-13 19:38:04,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,539 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 679 transitions. [2021-07-13 19:38:04,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,540 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 679 transitions. [2021-07-13 19:38:04,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:04,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,540 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 19:38:04,541 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1897351786, now seen corresponding path program 17 times [2021-07-13 19:38:04,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856559355] [2021-07-13 19:38:04,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:04,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:04,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856559355] [2021-07-13 19:38:04,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856559355] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:04,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:04,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:04,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110500897] [2021-07-13 19:38:04,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:04,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:04,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:04,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:04,635 INFO L87 Difference]: Start difference. First operand 224 states and 679 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:04,921 INFO L93 Difference]: Finished difference Result 491 states and 1364 transitions. [2021-07-13 19:38:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:04,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:04,924 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:38:04,924 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:38:04,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:38:04,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 227. [2021-07-13 19:38:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 3.0707964601769913) internal successors, (694), 226 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 694 transitions. [2021-07-13 19:38:04,932 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 694 transitions. Word has length 17 [2021-07-13 19:38:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:04,933 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 694 transitions. [2021-07-13 19:38:04,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 694 transitions. [2021-07-13 19:38:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:04,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:04,934 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:04,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 19:38:04,934 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:04,934 INFO L82 PathProgramCache]: Analyzing trace with hash -773277742, now seen corresponding path program 18 times [2021-07-13 19:38:04,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:04,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236631724] [2021-07-13 19:38:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:05,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236631724] [2021-07-13 19:38:05,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236631724] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:05,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105713112] [2021-07-13 19:38:05,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:05,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,028 INFO L87 Difference]: Start difference. First operand 227 states and 694 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,143 INFO L93 Difference]: Finished difference Result 417 states and 1196 transitions. [2021-07-13 19:38:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:05,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,145 INFO L225 Difference]: With dead ends: 417 [2021-07-13 19:38:05,145 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:38:05,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:38:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 231. [2021-07-13 19:38:05,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 3.121739130434783) internal successors, (718), 230 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 718 transitions. [2021-07-13 19:38:05,153 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 718 transitions. Word has length 17 [2021-07-13 19:38:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,153 INFO L482 AbstractCegarLoop]: Abstraction has 231 states and 718 transitions. [2021-07-13 19:38:05,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 718 transitions. [2021-07-13 19:38:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:05,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,154 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-13 19:38:05,154 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1982261886, now seen corresponding path program 19 times [2021-07-13 19:38:05,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353749555] [2021-07-13 19:38:05,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:05,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353749555] [2021-07-13 19:38:05,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353749555] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:05,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565938167] [2021-07-13 19:38:05,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:05,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:05,237 INFO L87 Difference]: Start difference. First operand 231 states and 718 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,349 INFO L93 Difference]: Finished difference Result 372 states and 1090 transitions. [2021-07-13 19:38:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,351 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:38:05,351 INFO L226 Difference]: Without dead ends: 345 [2021-07-13 19:38:05,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:05,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-07-13 19:38:05,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 237. [2021-07-13 19:38:05,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 3.114406779661017) internal successors, (735), 236 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 735 transitions. [2021-07-13 19:38:05,358 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 735 transitions. Word has length 17 [2021-07-13 19:38:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,358 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 735 transitions. [2021-07-13 19:38:05,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 735 transitions. [2021-07-13 19:38:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:05,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,359 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-13 19:38:05,360 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1814506960, now seen corresponding path program 20 times [2021-07-13 19:38:05,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907934986] [2021-07-13 19:38:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:05,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907934986] [2021-07-13 19:38:05,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907934986] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:05,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579649035] [2021-07-13 19:38:05,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:05,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:05,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:05,499 INFO L87 Difference]: Start difference. First operand 237 states and 735 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:05,754 INFO L93 Difference]: Finished difference Result 459 states and 1341 transitions. [2021-07-13 19:38:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:05,756 INFO L225 Difference]: With dead ends: 459 [2021-07-13 19:38:05,756 INFO L226 Difference]: Without dead ends: 444 [2021-07-13 19:38:05,756 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:05,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-13 19:38:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 245. [2021-07-13 19:38:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.151639344262295) internal successors, (769), 244 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 769 transitions. [2021-07-13 19:38:05,775 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 769 transitions. Word has length 17 [2021-07-13 19:38:05,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:05,775 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 769 transitions. [2021-07-13 19:38:05,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:05,775 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 769 transitions. [2021-07-13 19:38:05,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:05,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:05,776 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:05,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-07-13 19:38:05,776 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:05,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:05,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1247554880, now seen corresponding path program 21 times [2021-07-13 19:38:05,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:05,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533627591] [2021-07-13 19:38:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:05,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:05,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533627591] [2021-07-13 19:38:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533627591] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:05,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:05,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515442296] [2021-07-13 19:38:05,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:05,884 INFO L87 Difference]: Start difference. First operand 245 states and 769 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:06,212 INFO L93 Difference]: Finished difference Result 459 states and 1328 transitions. [2021-07-13 19:38:06,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:06,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:06,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:06,215 INFO L225 Difference]: With dead ends: 459 [2021-07-13 19:38:06,215 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:38:06,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:38:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 242. [2021-07-13 19:38:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.132780082987552) internal successors, (755), 241 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 755 transitions. [2021-07-13 19:38:06,224 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 755 transitions. Word has length 17 [2021-07-13 19:38:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:06,224 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 755 transitions. [2021-07-13 19:38:06,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 755 transitions. [2021-07-13 19:38:06,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:06,226 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:06,226 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:06,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-07-13 19:38:06,228 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:06,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1819009686, now seen corresponding path program 22 times [2021-07-13 19:38:06,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:06,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034649751] [2021-07-13 19:38:06,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:06,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:06,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034649751] [2021-07-13 19:38:06,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034649751] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:06,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:06,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:06,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894809894] [2021-07-13 19:38:06,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:06,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:06,331 INFO L87 Difference]: Start difference. First operand 242 states and 755 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:06,594 INFO L93 Difference]: Finished difference Result 464 states and 1336 transitions. [2021-07-13 19:38:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:06,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:06,597 INFO L225 Difference]: With dead ends: 464 [2021-07-13 19:38:06,597 INFO L226 Difference]: Without dead ends: 437 [2021-07-13 19:38:06,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-07-13 19:38:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 239. [2021-07-13 19:38:06,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 3.1260504201680672) internal successors, (744), 238 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 744 transitions. [2021-07-13 19:38:06,605 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 744 transitions. Word has length 17 [2021-07-13 19:38:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:06,605 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 744 transitions. [2021-07-13 19:38:06,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 744 transitions. [2021-07-13 19:38:06,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:06,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:06,606 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:06,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-07-13 19:38:06,606 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:06,607 INFO L82 PathProgramCache]: Analyzing trace with hash -641213590, now seen corresponding path program 23 times [2021-07-13 19:38:06,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:06,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778887640] [2021-07-13 19:38:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:06,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:06,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778887640] [2021-07-13 19:38:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778887640] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:06,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:06,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:06,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868755984] [2021-07-13 19:38:06,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:06,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:06,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:06,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:06,717 INFO L87 Difference]: Start difference. First operand 239 states and 744 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,041 INFO L93 Difference]: Finished difference Result 501 states and 1445 transitions. [2021-07-13 19:38:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:07,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,044 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:38:07,044 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:38:07,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:38:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 245. [2021-07-13 19:38:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.168032786885246) internal successors, (773), 244 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 773 transitions. [2021-07-13 19:38:07,054 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 773 transitions. Word has length 17 [2021-07-13 19:38:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,054 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 773 transitions. [2021-07-13 19:38:07,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 773 transitions. [2021-07-13 19:38:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:07,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,056 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-07-13 19:38:07,056 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -74261510, now seen corresponding path program 24 times [2021-07-13 19:38:07,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136530990] [2021-07-13 19:38:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:07,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:07,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136530990] [2021-07-13 19:38:07,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136530990] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:07,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:07,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232304109] [2021-07-13 19:38:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:07,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:07,190 INFO L87 Difference]: Start difference. First operand 245 states and 773 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,471 INFO L93 Difference]: Finished difference Result 501 states and 1432 transitions. [2021-07-13 19:38:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,473 INFO L225 Difference]: With dead ends: 501 [2021-07-13 19:38:07,473 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:38:07,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:38:07,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 242. [2021-07-13 19:38:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.1493775933609958) internal successors, (759), 241 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 759 transitions. [2021-07-13 19:38:07,481 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 759 transitions. Word has length 17 [2021-07-13 19:38:07,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,481 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 759 transitions. [2021-07-13 19:38:07,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,481 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 759 transitions. [2021-07-13 19:38:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:07,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,482 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-07-13 19:38:07,482 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,483 INFO L82 PathProgramCache]: Analyzing trace with hash 651128810, now seen corresponding path program 25 times [2021-07-13 19:38:07,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096155836] [2021-07-13 19:38:07,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:07,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:07,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:07,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096155836] [2021-07-13 19:38:07,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096155836] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:07,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:07,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:07,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109014946] [2021-07-13 19:38:07,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:07,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:07,588 INFO L87 Difference]: Start difference. First operand 242 states and 759 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:07,800 INFO L93 Difference]: Finished difference Result 491 states and 1419 transitions. [2021-07-13 19:38:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:07,802 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:38:07,802 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 19:38:07,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 212.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 19:38:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 245. [2021-07-13 19:38:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 3.1639344262295084) internal successors, (772), 244 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 772 transitions. [2021-07-13 19:38:07,822 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 772 transitions. Word has length 17 [2021-07-13 19:38:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:07,823 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 772 transitions. [2021-07-13 19:38:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 772 transitions. [2021-07-13 19:38:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:07,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:07,826 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:07,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-07-13 19:38:07,826 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 275931370, now seen corresponding path program 26 times [2021-07-13 19:38:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148895214] [2021-07-13 19:38:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:07,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:07,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148895214] [2021-07-13 19:38:07,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148895214] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:07,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:07,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:07,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105364272] [2021-07-13 19:38:07,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:07,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:07,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:07,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:07,955 INFO L87 Difference]: Start difference. First operand 245 states and 772 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:08,270 INFO L93 Difference]: Finished difference Result 477 states and 1392 transitions. [2021-07-13 19:38:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:08,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:08,273 INFO L225 Difference]: With dead ends: 477 [2021-07-13 19:38:08,273 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:38:08,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:08,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:38:08,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 242. [2021-07-13 19:38:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 3.141078838174274) internal successors, (757), 241 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 757 transitions. [2021-07-13 19:38:08,287 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 757 transitions. Word has length 17 [2021-07-13 19:38:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:08,287 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 757 transitions. [2021-07-13 19:38:08,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 757 transitions. [2021-07-13 19:38:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:08,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:08,288 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:08,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-07-13 19:38:08,288 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:08,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:08,288 INFO L82 PathProgramCache]: Analyzing trace with hash 447035002, now seen corresponding path program 27 times [2021-07-13 19:38:08,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:08,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343906252] [2021-07-13 19:38:08,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:08,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343906252] [2021-07-13 19:38:08,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343906252] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:08,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:08,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:08,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581611628] [2021-07-13 19:38:08,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:08,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:08,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:08,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:08,381 INFO L87 Difference]: Start difference. First operand 242 states and 757 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:08,614 INFO L93 Difference]: Finished difference Result 515 states and 1469 transitions. [2021-07-13 19:38:08,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:08,616 INFO L225 Difference]: With dead ends: 515 [2021-07-13 19:38:08,617 INFO L226 Difference]: Without dead ends: 488 [2021-07-13 19:38:08,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:08,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-07-13 19:38:08,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 244. [2021-07-13 19:38:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-07-13 19:38:08,625 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-07-13 19:38:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:08,625 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-07-13 19:38:08,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-07-13 19:38:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:08,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:08,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:08,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-07-13 19:38:08,626 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:08,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1316167168, now seen corresponding path program 28 times [2021-07-13 19:38:08,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:08,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144334920] [2021-07-13 19:38:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:08,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:08,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144334920] [2021-07-13 19:38:08,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144334920] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:08,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:08,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:08,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814384790] [2021-07-13 19:38:08,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:08,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:08,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:08,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:08,740 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:08,984 INFO L93 Difference]: Finished difference Result 486 states and 1417 transitions. [2021-07-13 19:38:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:08,987 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:38:08,987 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:38:08,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 245.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:38:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 244. [2021-07-13 19:38:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 3.1358024691358026) internal successors, (762), 243 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 762 transitions. [2021-07-13 19:38:08,994 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 762 transitions. Word has length 17 [2021-07-13 19:38:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:08,995 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 762 transitions. [2021-07-13 19:38:08,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 762 transitions. [2021-07-13 19:38:08,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:08,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:08,996 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:08,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-07-13 19:38:08,996 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:08,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:08,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1963810802, now seen corresponding path program 29 times [2021-07-13 19:38:08,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:08,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795334576] [2021-07-13 19:38:08,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795334576] [2021-07-13 19:38:09,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795334576] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:09,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:09,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:09,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366344855] [2021-07-13 19:38:09,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:09,081 INFO L87 Difference]: Start difference. First operand 244 states and 762 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,299 INFO L93 Difference]: Finished difference Result 476 states and 1397 transitions. [2021-07-13 19:38:09,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:09,299 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:09,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,301 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:38:09,301 INFO L226 Difference]: Without dead ends: 461 [2021-07-13 19:38:09,301 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:09,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-07-13 19:38:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 250. [2021-07-13 19:38:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 3.1526104417670684) internal successors, (785), 249 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 785 transitions. [2021-07-13 19:38:09,308 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 785 transitions. Word has length 17 [2021-07-13 19:38:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,309 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 785 transitions. [2021-07-13 19:38:09,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 785 transitions. [2021-07-13 19:38:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:09,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,310 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-07-13 19:38:09,310 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash -706818726, now seen corresponding path program 30 times [2021-07-13 19:38:09,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136573068] [2021-07-13 19:38:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136573068] [2021-07-13 19:38:09,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136573068] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:09,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:09,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364926988] [2021-07-13 19:38:09,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:09,372 INFO L87 Difference]: Start difference. First operand 250 states and 785 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,455 INFO L93 Difference]: Finished difference Result 445 states and 1315 transitions. [2021-07-13 19:38:09,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:09,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,456 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:38:09,457 INFO L226 Difference]: Without dead ends: 418 [2021-07-13 19:38:09,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-07-13 19:38:09,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 259. [2021-07-13 19:38:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.197674418604651) internal successors, (825), 258 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 825 transitions. [2021-07-13 19:38:09,463 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 825 transitions. Word has length 17 [2021-07-13 19:38:09,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,463 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 825 transitions. [2021-07-13 19:38:09,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,463 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 825 transitions. [2021-07-13 19:38:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:09,464 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,464 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-07-13 19:38:09,465 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1915802870, now seen corresponding path program 31 times [2021-07-13 19:38:09,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576975013] [2021-07-13 19:38:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576975013] [2021-07-13 19:38:09,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576975013] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:09,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:09,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:09,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917178241] [2021-07-13 19:38:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:09,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:09,518 INFO L87 Difference]: Start difference. First operand 259 states and 825 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,597 INFO L93 Difference]: Finished difference Result 458 states and 1353 transitions. [2021-07-13 19:38:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:09,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:09,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,599 INFO L225 Difference]: With dead ends: 458 [2021-07-13 19:38:09,599 INFO L226 Difference]: Without dead ends: 431 [2021-07-13 19:38:09,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-07-13 19:38:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 252. [2021-07-13 19:38:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-07-13 19:38:09,605 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-07-13 19:38:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,605 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-07-13 19:38:09,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,605 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-07-13 19:38:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:09,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,606 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-07-13 19:38:09,606 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash 939630764, now seen corresponding path program 32 times [2021-07-13 19:38:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384372926] [2021-07-13 19:38:09,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384372926] [2021-07-13 19:38:09,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384372926] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:09,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:09,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:09,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277005363] [2021-07-13 19:38:09,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:09,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:09,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:09,680 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:09,851 INFO L93 Difference]: Finished difference Result 403 states and 1169 transitions. [2021-07-13 19:38:09,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:09,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:09,853 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:38:09,853 INFO L226 Difference]: Without dead ends: 376 [2021-07-13 19:38:09,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-07-13 19:38:09,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 254. [2021-07-13 19:38:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 3.1343873517786562) internal successors, (793), 253 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 793 transitions. [2021-07-13 19:38:09,859 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 793 transitions. Word has length 17 [2021-07-13 19:38:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:09,859 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 793 transitions. [2021-07-13 19:38:09,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 793 transitions. [2021-07-13 19:38:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:09,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:09,859 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:09,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-07-13 19:38:09,860 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:09,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1808762930, now seen corresponding path program 33 times [2021-07-13 19:38:09,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:09,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684395852] [2021-07-13 19:38:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:09,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:09,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684395852] [2021-07-13 19:38:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684395852] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:09,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:09,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:09,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282391841] [2021-07-13 19:38:09,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:09,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:09,949 INFO L87 Difference]: Start difference. First operand 254 states and 793 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,169 INFO L93 Difference]: Finished difference Result 403 states and 1175 transitions. [2021-07-13 19:38:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:10,170 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:10,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,172 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:38:10,172 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:38:10,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:10,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:38:10,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 252. [2021-07-13 19:38:10,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-07-13 19:38:10,179 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-07-13 19:38:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,179 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-07-13 19:38:10,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-07-13 19:38:10,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:38:10,180 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,180 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-07-13 19:38:10,180 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,180 INFO L82 PathProgramCache]: Analyzing trace with hash 421173314, now seen corresponding path program 34 times [2021-07-13 19:38:10,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082117058] [2021-07-13 19:38:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082117058] [2021-07-13 19:38:10,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082117058] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:10,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:10,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:38:10,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139862340] [2021-07-13 19:38:10,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:38:10,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:38:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:38:10,224 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,295 INFO L93 Difference]: Finished difference Result 380 states and 1126 transitions. [2021-07-13 19:38:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:38:10,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:38:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,297 INFO L225 Difference]: With dead ends: 380 [2021-07-13 19:38:10,297 INFO L226 Difference]: Without dead ends: 353 [2021-07-13 19:38:10,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-07-13 19:38:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 252. [2021-07-13 19:38:10,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 3.139442231075697) internal successors, (788), 251 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 788 transitions. [2021-07-13 19:38:10,303 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 788 transitions. Word has length 17 [2021-07-13 19:38:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,303 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 788 transitions. [2021-07-13 19:38:10,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,303 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 788 transitions. [2021-07-13 19:38:10,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:10,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,304 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-07-13 19:38:10,304 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash -847314392, now seen corresponding path program 1 times [2021-07-13 19:38:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687871268] [2021-07-13 19:38:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687871268] [2021-07-13 19:38:10,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687871268] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:10,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:10,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505629517] [2021-07-13 19:38:10,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:10,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:10,355 INFO L87 Difference]: Start difference. First operand 252 states and 788 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,483 INFO L93 Difference]: Finished difference Result 445 states and 1298 transitions. [2021-07-13 19:38:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,485 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:38:10,485 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:38:10,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:38:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 257. [2021-07-13 19:38:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-07-13 19:38:10,492 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-07-13 19:38:10,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,492 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-07-13 19:38:10,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-07-13 19:38:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:10,493 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,493 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-07-13 19:38:10,493 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash -47426210, now seen corresponding path program 1 times [2021-07-13 19:38:10,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857961212] [2021-07-13 19:38:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857961212] [2021-07-13 19:38:10,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857961212] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:10,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:10,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:38:10,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408842099] [2021-07-13 19:38:10,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:10,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:10,547 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,663 INFO L93 Difference]: Finished difference Result 496 states and 1436 transitions. [2021-07-13 19:38:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,666 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:38:10,666 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:38:10,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:10,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:38:10,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 257. [2021-07-13 19:38:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 3.12890625) internal successors, (801), 256 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 801 transitions. [2021-07-13 19:38:10,673 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 801 transitions. Word has length 18 [2021-07-13 19:38:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,673 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 801 transitions. [2021-07-13 19:38:10,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 801 transitions. [2021-07-13 19:38:10,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:10,674 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,674 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-07-13 19:38:10,674 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1111217320, now seen corresponding path program 2 times [2021-07-13 19:38:10,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017402830] [2021-07-13 19:38:10,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017402830] [2021-07-13 19:38:10,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017402830] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:10,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:10,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:10,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032368678] [2021-07-13 19:38:10,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:10,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:10,718 INFO L87 Difference]: Start difference. First operand 257 states and 801 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:10,849 INFO L93 Difference]: Finished difference Result 505 states and 1450 transitions. [2021-07-13 19:38:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:10,849 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:10,851 INFO L225 Difference]: With dead ends: 505 [2021-07-13 19:38:10,851 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 19:38:10,851 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 19:38:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 260. [2021-07-13 19:38:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.135135135135135) internal successors, (812), 259 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 812 transitions. [2021-07-13 19:38:10,858 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 812 transitions. Word has length 18 [2021-07-13 19:38:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:10,858 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 812 transitions. [2021-07-13 19:38:10,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 812 transitions. [2021-07-13 19:38:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:10,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:10,859 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:10,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-07-13 19:38:10,859 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash -382690402, now seen corresponding path program 3 times [2021-07-13 19:38:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:10,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825516060] [2021-07-13 19:38:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:10,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:10,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825516060] [2021-07-13 19:38:10,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825516060] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:10,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:10,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:10,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280475116] [2021-07-13 19:38:10,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:10,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:10,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:10,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:10,900 INFO L87 Difference]: Start difference. First operand 260 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,045 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-07-13 19:38:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,047 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:38:11,047 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:38:11,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:38:11,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 260. [2021-07-13 19:38:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.1235521235521237) internal successors, (809), 259 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 809 transitions. [2021-07-13 19:38:11,055 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 809 transitions. Word has length 18 [2021-07-13 19:38:11,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,055 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 809 transitions. [2021-07-13 19:38:11,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,055 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 809 transitions. [2021-07-13 19:38:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:11,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,056 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-07-13 19:38:11,056 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash -995566800, now seen corresponding path program 4 times [2021-07-13 19:38:11,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027637005] [2021-07-13 19:38:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027637005] [2021-07-13 19:38:11,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027637005] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:11,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:11,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594666335] [2021-07-13 19:38:11,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:11,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:11,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:11,102 INFO L87 Difference]: Start difference. First operand 260 states and 809 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,220 INFO L93 Difference]: Finished difference Result 481 states and 1389 transitions. [2021-07-13 19:38:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,222 INFO L225 Difference]: With dead ends: 481 [2021-07-13 19:38:11,222 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:38:11,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:38:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 266. [2021-07-13 19:38:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 3.1358490566037736) internal successors, (831), 265 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 831 transitions. [2021-07-13 19:38:11,229 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 831 transitions. Word has length 18 [2021-07-13 19:38:11,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,229 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 831 transitions. [2021-07-13 19:38:11,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,229 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 831 transitions. [2021-07-13 19:38:11,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:11,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,230 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-07-13 19:38:11,230 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1805492774, now seen corresponding path program 5 times [2021-07-13 19:38:11,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143669381] [2021-07-13 19:38:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143669381] [2021-07-13 19:38:11,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143669381] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:11,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:11,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:11,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496765656] [2021-07-13 19:38:11,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:11,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:11,271 INFO L87 Difference]: Start difference. First operand 266 states and 831 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,398 INFO L93 Difference]: Finished difference Result 487 states and 1396 transitions. [2021-07-13 19:38:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:11,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,399 INFO L225 Difference]: With dead ends: 487 [2021-07-13 19:38:11,399 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:38:11,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:11,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:38:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 263. [2021-07-13 19:38:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.1297709923664123) internal successors, (820), 262 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 820 transitions. [2021-07-13 19:38:11,407 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 820 transitions. Word has length 18 [2021-07-13 19:38:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,407 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 820 transitions. [2021-07-13 19:38:11,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 820 transitions. [2021-07-13 19:38:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:11,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,408 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-07-13 19:38:11,408 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1270262972, now seen corresponding path program 6 times [2021-07-13 19:38:11,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193257628] [2021-07-13 19:38:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193257628] [2021-07-13 19:38:11,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193257628] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:11,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:11,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:11,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878150283] [2021-07-13 19:38:11,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:11,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:11,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:11,452 INFO L87 Difference]: Start difference. First operand 263 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,581 INFO L93 Difference]: Finished difference Result 445 states and 1301 transitions. [2021-07-13 19:38:11,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:11,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,585 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:38:11,585 INFO L226 Difference]: Without dead ends: 433 [2021-07-13 19:38:11,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-07-13 19:38:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 263. [2021-07-13 19:38:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-07-13 19:38:11,592 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-07-13 19:38:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,592 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-07-13 19:38:11,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-07-13 19:38:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:11,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,593 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-13 19:38:11,594 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1406182626, now seen corresponding path program 2 times [2021-07-13 19:38:11,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376555291] [2021-07-13 19:38:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376555291] [2021-07-13 19:38:11,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376555291] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:11,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:11,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:11,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424106291] [2021-07-13 19:38:11,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:11,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:11,675 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:11,861 INFO L93 Difference]: Finished difference Result 571 states and 1616 transitions. [2021-07-13 19:38:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:11,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:11,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:11,863 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:38:11,863 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:38:11,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:38:11,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 268. [2021-07-13 19:38:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.108614232209738) internal successors, (830), 267 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 830 transitions. [2021-07-13 19:38:11,871 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 830 transitions. Word has length 18 [2021-07-13 19:38:11,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:11,871 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 830 transitions. [2021-07-13 19:38:11,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:11,871 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 830 transitions. [2021-07-13 19:38:11,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:11,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:11,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:11,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-07-13 19:38:11,872 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:11,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1870302100, now seen corresponding path program 3 times [2021-07-13 19:38:11,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:11,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862527108] [2021-07-13 19:38:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:11,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:11,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862527108] [2021-07-13 19:38:11,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862527108] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:11,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:11,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:11,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214776888] [2021-07-13 19:38:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:11,922 INFO L87 Difference]: Start difference. First operand 268 states and 830 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,112 INFO L93 Difference]: Finished difference Result 596 states and 1673 transitions. [2021-07-13 19:38:12,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:12,114 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:12,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,115 INFO L225 Difference]: With dead ends: 596 [2021-07-13 19:38:12,115 INFO L226 Difference]: Without dead ends: 589 [2021-07-13 19:38:12,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-13 19:38:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 281. [2021-07-13 19:38:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.0964285714285715) internal successors, (867), 280 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 867 transitions. [2021-07-13 19:38:12,125 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 867 transitions. Word has length 18 [2021-07-13 19:38:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,127 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 867 transitions. [2021-07-13 19:38:12,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 867 transitions. [2021-07-13 19:38:12,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:12,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,128 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-07-13 19:38:12,128 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 429863782, now seen corresponding path program 4 times [2021-07-13 19:38:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588882509] [2021-07-13 19:38:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588882509] [2021-07-13 19:38:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588882509] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:12,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:12,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:12,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700629140] [2021-07-13 19:38:12,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:12,183 INFO L87 Difference]: Start difference. First operand 281 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,319 INFO L93 Difference]: Finished difference Result 565 states and 1612 transitions. [2021-07-13 19:38:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:12,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,322 INFO L225 Difference]: With dead ends: 565 [2021-07-13 19:38:12,322 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:38:12,322 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:38:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 263. [2021-07-13 19:38:12,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.118320610687023) internal successors, (817), 262 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 817 transitions. [2021-07-13 19:38:12,330 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 817 transitions. Word has length 18 [2021-07-13 19:38:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,330 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 817 transitions. [2021-07-13 19:38:12,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,331 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 817 transitions. [2021-07-13 19:38:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:12,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,332 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-07-13 19:38:12,332 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -973318070, now seen corresponding path program 5 times [2021-07-13 19:38:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130538443] [2021-07-13 19:38:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130538443] [2021-07-13 19:38:12,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130538443] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:12,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:12,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:12,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723387069] [2021-07-13 19:38:12,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:12,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:12,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:12,390 INFO L87 Difference]: Start difference. First operand 263 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,549 INFO L93 Difference]: Finished difference Result 503 states and 1444 transitions. [2021-07-13 19:38:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,551 INFO L225 Difference]: With dead ends: 503 [2021-07-13 19:38:12,551 INFO L226 Difference]: Without dead ends: 485 [2021-07-13 19:38:12,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 118.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-13 19:38:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 267. [2021-07-13 19:38:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-07-13 19:38:12,557 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-07-13 19:38:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,557 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-07-13 19:38:12,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,557 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-07-13 19:38:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:12,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,558 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-07-13 19:38:12,558 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 491168226, now seen corresponding path program 6 times [2021-07-13 19:38:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025236317] [2021-07-13 19:38:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025236317] [2021-07-13 19:38:12,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025236317] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:12,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:12,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:12,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459575554] [2021-07-13 19:38:12,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:12,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:12,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:12,607 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,727 INFO L93 Difference]: Finished difference Result 493 states and 1423 transitions. [2021-07-13 19:38:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,728 INFO L225 Difference]: With dead ends: 493 [2021-07-13 19:38:12,729 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:38:12,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:38:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 278. [2021-07-13 19:38:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.0902527075812274) internal successors, (856), 277 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 856 transitions. [2021-07-13 19:38:12,737 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 856 transitions. Word has length 18 [2021-07-13 19:38:12,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,737 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 856 transitions. [2021-07-13 19:38:12,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 856 transitions. [2021-07-13 19:38:12,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:12,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,738 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-07-13 19:38:12,738 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,739 INFO L82 PathProgramCache]: Analyzing trace with hash -275677922, now seen corresponding path program 7 times [2021-07-13 19:38:12,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631919069] [2021-07-13 19:38:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631919069] [2021-07-13 19:38:12,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631919069] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:12,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:12,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943600452] [2021-07-13 19:38:12,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:12,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:12,807 INFO L87 Difference]: Start difference. First operand 278 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:12,916 INFO L93 Difference]: Finished difference Result 462 states and 1366 transitions. [2021-07-13 19:38:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:12,918 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:38:12,918 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:38:12,918 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:12,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:38:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-07-13 19:38:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1090225563909772) internal successors, (827), 266 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 827 transitions. [2021-07-13 19:38:12,924 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 827 transitions. Word has length 18 [2021-07-13 19:38:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:12,924 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 827 transitions. [2021-07-13 19:38:12,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 827 transitions. [2021-07-13 19:38:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:12,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:12,925 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:12,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-07-13 19:38:12,925 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash -799867102, now seen corresponding path program 8 times [2021-07-13 19:38:12,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:12,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830839580] [2021-07-13 19:38:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:12,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:12,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830839580] [2021-07-13 19:38:12,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830839580] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:12,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:12,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:12,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952019286] [2021-07-13 19:38:12,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:12,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:12,993 INFO L87 Difference]: Start difference. First operand 267 states and 827 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,143 INFO L93 Difference]: Finished difference Result 562 states and 1608 transitions. [2021-07-13 19:38:13,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:13,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,145 INFO L225 Difference]: With dead ends: 562 [2021-07-13 19:38:13,145 INFO L226 Difference]: Without dead ends: 555 [2021-07-13 19:38:13,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-13 19:38:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 282. [2021-07-13 19:38:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.117437722419929) internal successors, (876), 281 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 876 transitions. [2021-07-13 19:38:13,153 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 876 transitions. Word has length 18 [2021-07-13 19:38:13,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,153 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 876 transitions. [2021-07-13 19:38:13,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,153 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 876 transitions. [2021-07-13 19:38:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:13,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,154 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-07-13 19:38:13,154 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2054661876, now seen corresponding path program 9 times [2021-07-13 19:38:13,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182811980] [2021-07-13 19:38:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:13,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:13,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182811980] [2021-07-13 19:38:13,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182811980] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:13,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:13,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:13,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540054071] [2021-07-13 19:38:13,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:13,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:13,210 INFO L87 Difference]: Start difference. First operand 282 states and 876 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,410 INFO L93 Difference]: Finished difference Result 571 states and 1643 transitions. [2021-07-13 19:38:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,412 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:38:13,412 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:38:13,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:13,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:38:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 279. [2021-07-13 19:38:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.1223021582733814) internal successors, (868), 278 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 868 transitions. [2021-07-13 19:38:13,420 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 868 transitions. Word has length 18 [2021-07-13 19:38:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,420 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 868 transitions. [2021-07-13 19:38:13,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 868 transitions. [2021-07-13 19:38:13,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:13,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,421 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-07-13 19:38:13,422 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1985003846, now seen corresponding path program 10 times [2021-07-13 19:38:13,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974727926] [2021-07-13 19:38:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:13,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:13,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974727926] [2021-07-13 19:38:13,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974727926] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:13,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:13,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:13,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112544955] [2021-07-13 19:38:13,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:13,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:13,477 INFO L87 Difference]: Start difference. First operand 279 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,611 INFO L93 Difference]: Finished difference Result 552 states and 1575 transitions. [2021-07-13 19:38:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,613 INFO L225 Difference]: With dead ends: 552 [2021-07-13 19:38:13,613 INFO L226 Difference]: Without dead ends: 545 [2021-07-13 19:38:13,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-07-13 19:38:13,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 283. [2021-07-13 19:38:13,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.127659574468085) internal successors, (882), 282 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 882 transitions. [2021-07-13 19:38:13,621 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 882 transitions. Word has length 18 [2021-07-13 19:38:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,621 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 882 transitions. [2021-07-13 19:38:13,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 882 transitions. [2021-07-13 19:38:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:13,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,622 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-07-13 19:38:13,622 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash 382898978, now seen corresponding path program 11 times [2021-07-13 19:38:13,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730396622] [2021-07-13 19:38:13,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:13,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:13,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730396622] [2021-07-13 19:38:13,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730396622] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:13,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:13,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:13,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753592466] [2021-07-13 19:38:13,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:13,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:13,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:13,677 INFO L87 Difference]: Start difference. First operand 283 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,796 INFO L93 Difference]: Finished difference Result 527 states and 1539 transitions. [2021-07-13 19:38:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,798 INFO L225 Difference]: With dead ends: 527 [2021-07-13 19:38:13,798 INFO L226 Difference]: Without dead ends: 527 [2021-07-13 19:38:13,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-07-13 19:38:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 281. [2021-07-13 19:38:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.132142857142857) internal successors, (877), 280 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 877 transitions. [2021-07-13 19:38:13,803 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 877 transitions. Word has length 18 [2021-07-13 19:38:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,803 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 877 transitions. [2021-07-13 19:38:13,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 877 transitions. [2021-07-13 19:38:13,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:13,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,804 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-07-13 19:38:13,804 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1962276450, now seen corresponding path program 12 times [2021-07-13 19:38:13,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112532999] [2021-07-13 19:38:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:13,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:13,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112532999] [2021-07-13 19:38:13,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112532999] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:13,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:13,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:13,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265001583] [2021-07-13 19:38:13,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:13,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:13,858 INFO L87 Difference]: Start difference. First operand 281 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:13,986 INFO L93 Difference]: Finished difference Result 528 states and 1534 transitions. [2021-07-13 19:38:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:13,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:13,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:13,987 INFO L225 Difference]: With dead ends: 528 [2021-07-13 19:38:13,987 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:38:13,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:13,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:38:13,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 278. [2021-07-13 19:38:13,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.115523465703971) internal successors, (863), 277 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 863 transitions. [2021-07-13 19:38:13,993 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 863 transitions. Word has length 18 [2021-07-13 19:38:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:13,994 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 863 transitions. [2021-07-13 19:38:13,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 863 transitions. [2021-07-13 19:38:13,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:13,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:13,994 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:13,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-07-13 19:38:13,995 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:13,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:13,995 INFO L82 PathProgramCache]: Analyzing trace with hash -708353078, now seen corresponding path program 13 times [2021-07-13 19:38:13,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:13,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641184936] [2021-07-13 19:38:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641184936] [2021-07-13 19:38:14,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641184936] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:14,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:14,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:14,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801892095] [2021-07-13 19:38:14,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:14,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:14,048 INFO L87 Difference]: Start difference. First operand 278 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,163 INFO L93 Difference]: Finished difference Result 492 states and 1454 transitions. [2021-07-13 19:38:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:14,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,165 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:38:14,165 INFO L226 Difference]: Without dead ends: 492 [2021-07-13 19:38:14,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-13 19:38:14,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 268. [2021-07-13 19:38:14,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.1198501872659175) internal successors, (833), 267 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 833 transitions. [2021-07-13 19:38:14,171 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 833 transitions. Word has length 18 [2021-07-13 19:38:14,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,171 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 833 transitions. [2021-07-13 19:38:14,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 833 transitions. [2021-07-13 19:38:14,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:14,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-07-13 19:38:14,173 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,173 INFO L82 PathProgramCache]: Analyzing trace with hash 634121620, now seen corresponding path program 14 times [2021-07-13 19:38:14,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245606852] [2021-07-13 19:38:14,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245606852] [2021-07-13 19:38:14,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245606852] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:14,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:14,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:14,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113603854] [2021-07-13 19:38:14,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:14,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:14,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:14,218 INFO L87 Difference]: Start difference. First operand 268 states and 833 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,364 INFO L93 Difference]: Finished difference Result 569 states and 1632 transitions. [2021-07-13 19:38:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,366 INFO L225 Difference]: With dead ends: 569 [2021-07-13 19:38:14,366 INFO L226 Difference]: Without dead ends: 562 [2021-07-13 19:38:14,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:14,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-07-13 19:38:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 287. [2021-07-13 19:38:14,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.1083916083916083) internal successors, (889), 286 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 889 transitions. [2021-07-13 19:38:14,374 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 889 transitions. Word has length 18 [2021-07-13 19:38:14,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,374 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 889 transitions. [2021-07-13 19:38:14,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,374 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 889 transitions. [2021-07-13 19:38:14,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:14,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,375 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-07-13 19:38:14,375 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,376 INFO L82 PathProgramCache]: Analyzing trace with hash -806316698, now seen corresponding path program 15 times [2021-07-13 19:38:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001666183] [2021-07-13 19:38:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001666183] [2021-07-13 19:38:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001666183] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:14,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:14,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:14,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687639184] [2021-07-13 19:38:14,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:14,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:14,427 INFO L87 Difference]: Start difference. First operand 287 states and 889 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,602 INFO L93 Difference]: Finished difference Result 571 states and 1645 transitions. [2021-07-13 19:38:14,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,604 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:38:14,604 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:38:14,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:38:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 284. [2021-07-13 19:38:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.1130742049469964) internal successors, (881), 283 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 881 transitions. [2021-07-13 19:38:14,611 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 881 transitions. Word has length 18 [2021-07-13 19:38:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,611 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 881 transitions. [2021-07-13 19:38:14,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,611 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 881 transitions. [2021-07-13 19:38:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:14,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,612 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-07-13 19:38:14,612 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 269394458, now seen corresponding path program 16 times [2021-07-13 19:38:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557535382] [2021-07-13 19:38:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557535382] [2021-07-13 19:38:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557535382] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:14,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:14,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:14,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960012051] [2021-07-13 19:38:14,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:14,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:14,667 INFO L87 Difference]: Start difference. First operand 284 states and 881 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:14,802 INFO L93 Difference]: Finished difference Result 605 states and 1745 transitions. [2021-07-13 19:38:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:14,808 INFO L225 Difference]: With dead ends: 605 [2021-07-13 19:38:14,808 INFO L226 Difference]: Without dead ends: 605 [2021-07-13 19:38:14,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-07-13 19:38:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 281. [2021-07-13 19:38:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-07-13 19:38:14,816 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-07-13 19:38:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:14,817 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-07-13 19:38:14,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-07-13 19:38:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:14,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:14,818 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:14,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-07-13 19:38:14,818 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:14,818 INFO L82 PathProgramCache]: Analyzing trace with hash -154077336, now seen corresponding path program 7 times [2021-07-13 19:38:14,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:14,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928916650] [2021-07-13 19:38:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:14,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:14,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928916650] [2021-07-13 19:38:14,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928916650] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:14,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:14,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:14,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664980912] [2021-07-13 19:38:14,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:14,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:14,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:14,871 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:15,062 INFO L93 Difference]: Finished difference Result 576 states and 1677 transitions. [2021-07-13 19:38:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:15,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:15,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:15,064 INFO L225 Difference]: With dead ends: 576 [2021-07-13 19:38:15,065 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:38:15,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:38:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 288. [2021-07-13 19:38:15,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.1498257839721253) internal successors, (904), 287 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 904 transitions. [2021-07-13 19:38:15,072 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 904 transitions. Word has length 18 [2021-07-13 19:38:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:15,072 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 904 transitions. [2021-07-13 19:38:15,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 904 transitions. [2021-07-13 19:38:15,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:15,073 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:15,073 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:15,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-07-13 19:38:15,073 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:15,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:15,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1647985058, now seen corresponding path program 8 times [2021-07-13 19:38:15,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:15,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334312781] [2021-07-13 19:38:15,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:15,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:15,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334312781] [2021-07-13 19:38:15,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334312781] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:15,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:15,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:15,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913013985] [2021-07-13 19:38:15,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:15,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:15,129 INFO L87 Difference]: Start difference. First operand 288 states and 904 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:15,304 INFO L93 Difference]: Finished difference Result 582 states and 1678 transitions. [2021-07-13 19:38:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:15,306 INFO L225 Difference]: With dead ends: 582 [2021-07-13 19:38:15,306 INFO L226 Difference]: Without dead ends: 576 [2021-07-13 19:38:15,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-07-13 19:38:15,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 291. [2021-07-13 19:38:15,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1241379310344826) internal successors, (906), 290 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 906 transitions. [2021-07-13 19:38:15,313 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 906 transitions. Word has length 18 [2021-07-13 19:38:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:15,313 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 906 transitions. [2021-07-13 19:38:15,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 906 transitions. [2021-07-13 19:38:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:15,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:15,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:15,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-07-13 19:38:15,315 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:15,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:15,315 INFO L82 PathProgramCache]: Analyzing trace with hash 597323102, now seen corresponding path program 9 times [2021-07-13 19:38:15,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:15,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166117127] [2021-07-13 19:38:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:15,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166117127] [2021-07-13 19:38:15,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166117127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170193719] [2021-07-13 19:38:15,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:15,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:15,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:15,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:15,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170193719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:15,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:15,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:15,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120484360] [2021-07-13 19:38:15,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:15,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:15,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:15,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:15,597 INFO L87 Difference]: Start difference. First operand 291 states and 906 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,068 INFO L93 Difference]: Finished difference Result 573 states and 1656 transitions. [2021-07-13 19:38:16,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:16,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,070 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:38:16,070 INFO L226 Difference]: Without dead ends: 573 [2021-07-13 19:38:16,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-07-13 19:38:16,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 284. [2021-07-13 19:38:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.137809187279152) internal successors, (888), 283 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 888 transitions. [2021-07-13 19:38:16,082 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 888 transitions. Word has length 18 [2021-07-13 19:38:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,082 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 888 transitions. [2021-07-13 19:38:16,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 888 transitions. [2021-07-13 19:38:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:16,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,084 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:38:16,307 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1889665502, now seen corresponding path program 10 times [2021-07-13 19:38:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210249012] [2021-07-13 19:38:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210249012] [2021-07-13 19:38:16,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210249012] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:16,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:16,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129726949] [2021-07-13 19:38:16,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:16,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:16,370 INFO L87 Difference]: Start difference. First operand 284 states and 888 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,493 INFO L93 Difference]: Finished difference Result 536 states and 1574 transitions. [2021-07-13 19:38:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,495 INFO L225 Difference]: With dead ends: 536 [2021-07-13 19:38:16,495 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:38:16,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:38:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 281. [2021-07-13 19:38:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 3.117857142857143) internal successors, (873), 280 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 873 transitions. [2021-07-13 19:38:16,503 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 873 transitions. Word has length 18 [2021-07-13 19:38:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,503 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 873 transitions. [2021-07-13 19:38:16,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,504 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 873 transitions. [2021-07-13 19:38:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:16,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,504 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-07-13 19:38:16,505 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash 618059630, now seen corresponding path program 11 times [2021-07-13 19:38:16,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622731484] [2021-07-13 19:38:16,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622731484] [2021-07-13 19:38:16,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622731484] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:16,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:16,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43069789] [2021-07-13 19:38:16,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:16,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:16,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:16,562 INFO L87 Difference]: Start difference. First operand 281 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,712 INFO L93 Difference]: Finished difference Result 573 states and 1648 transitions. [2021-07-13 19:38:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:16,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,714 INFO L225 Difference]: With dead ends: 573 [2021-07-13 19:38:16,714 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:38:16,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 109.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:38:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 291. [2021-07-13 19:38:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.103448275862069) internal successors, (900), 290 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 900 transitions. [2021-07-13 19:38:16,724 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 900 transitions. Word has length 18 [2021-07-13 19:38:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,724 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 900 transitions. [2021-07-13 19:38:16,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,724 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 900 transitions. [2021-07-13 19:38:16,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:16,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,725 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-07-13 19:38:16,725 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1297364296, now seen corresponding path program 12 times [2021-07-13 19:38:16,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692417191] [2021-07-13 19:38:16,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692417191] [2021-07-13 19:38:16,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692417191] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:16,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:16,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279081447] [2021-07-13 19:38:16,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:16,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:16,786 INFO L87 Difference]: Start difference. First operand 291 states and 900 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:16,908 INFO L93 Difference]: Finished difference Result 550 states and 1609 transitions. [2021-07-13 19:38:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:16,910 INFO L225 Difference]: With dead ends: 550 [2021-07-13 19:38:16,910 INFO L226 Difference]: Without dead ends: 550 [2021-07-13 19:38:16,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-07-13 19:38:16,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 280. [2021-07-13 19:38:16,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-07-13 19:38:16,919 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-07-13 19:38:16,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:16,919 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-07-13 19:38:16,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:16,919 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-07-13 19:38:16,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:16,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:16,929 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:16,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-07-13 19:38:16,929 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:16,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:16,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1494369000, now seen corresponding path program 13 times [2021-07-13 19:38:16,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:16,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979555835] [2021-07-13 19:38:16,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:16,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:16,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979555835] [2021-07-13 19:38:16,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979555835] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:16,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:16,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:16,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692992855] [2021-07-13 19:38:16,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:16,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:16,982 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,097 INFO L93 Difference]: Finished difference Result 511 states and 1487 transitions. [2021-07-13 19:38:17,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,099 INFO L225 Difference]: With dead ends: 511 [2021-07-13 19:38:17,099 INFO L226 Difference]: Without dead ends: 505 [2021-07-13 19:38:17,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-07-13 19:38:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 290. [2021-07-13 19:38:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.093425605536332) internal successors, (894), 289 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 894 transitions. [2021-07-13 19:38:17,106 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 894 transitions. Word has length 18 [2021-07-13 19:38:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,106 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 894 transitions. [2021-07-13 19:38:17,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,107 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 894 transitions. [2021-07-13 19:38:17,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:17,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,107 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-07-13 19:38:17,108 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,109 INFO L82 PathProgramCache]: Analyzing trace with hash 885174370, now seen corresponding path program 14 times [2021-07-13 19:38:17,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400807712] [2021-07-13 19:38:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400807712] [2021-07-13 19:38:17,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400807712] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:17,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:17,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:17,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518375201] [2021-07-13 19:38:17,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:17,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:17,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:17,162 INFO L87 Difference]: Start difference. First operand 290 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,264 INFO L93 Difference]: Finished difference Result 482 states and 1433 transitions. [2021-07-13 19:38:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,266 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:38:17,266 INFO L226 Difference]: Without dead ends: 482 [2021-07-13 19:38:17,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-07-13 19:38:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 278. [2021-07-13 19:38:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.111913357400722) internal successors, (862), 277 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 862 transitions. [2021-07-13 19:38:17,274 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 862 transitions. Word has length 18 [2021-07-13 19:38:17,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,275 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 862 transitions. [2021-07-13 19:38:17,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,275 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 862 transitions. [2021-07-13 19:38:17,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:17,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,276 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-07-13 19:38:17,276 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1700413548, now seen corresponding path program 17 times [2021-07-13 19:38:17,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540846214] [2021-07-13 19:38:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540846214] [2021-07-13 19:38:17,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540846214] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:17,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:17,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:17,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917532462] [2021-07-13 19:38:17,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:17,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:17,323 INFO L87 Difference]: Start difference. First operand 278 states and 862 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,466 INFO L93 Difference]: Finished difference Result 591 states and 1712 transitions. [2021-07-13 19:38:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,468 INFO L225 Difference]: With dead ends: 591 [2021-07-13 19:38:17,468 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:38:17,468 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:38:17,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 265. [2021-07-13 19:38:17,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.1136363636363638) internal successors, (822), 264 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 822 transitions. [2021-07-13 19:38:17,475 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 822 transitions. Word has length 18 [2021-07-13 19:38:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,476 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 822 transitions. [2021-07-13 19:38:17,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,476 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 822 transitions. [2021-07-13 19:38:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:17,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,477 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-07-13 19:38:17,477 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 920966376, now seen corresponding path program 18 times [2021-07-13 19:38:17,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722933806] [2021-07-13 19:38:17,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722933806] [2021-07-13 19:38:17,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722933806] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:17,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:17,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:17,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035151225] [2021-07-13 19:38:17,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:17,552 INFO L87 Difference]: Start difference. First operand 265 states and 822 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:17,683 INFO L93 Difference]: Finished difference Result 471 states and 1344 transitions. [2021-07-13 19:38:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:17,685 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:38:17,685 INFO L226 Difference]: Without dead ends: 453 [2021-07-13 19:38:17,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-07-13 19:38:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 265. [2021-07-13 19:38:17,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0946969696969697) internal successors, (817), 264 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 817 transitions. [2021-07-13 19:38:17,691 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 817 transitions. Word has length 18 [2021-07-13 19:38:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:17,692 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 817 transitions. [2021-07-13 19:38:17,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 817 transitions. [2021-07-13 19:38:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:17,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:17,693 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:17,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-07-13 19:38:17,693 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1720854558, now seen corresponding path program 15 times [2021-07-13 19:38:17,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:17,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143010443] [2021-07-13 19:38:17,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143010443] [2021-07-13 19:38:17,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143010443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:17,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895360841] [2021-07-13 19:38:17,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:17,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:17,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:17,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:17,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:17,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895360841] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:17,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:17,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11 [2021-07-13 19:38:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414928731] [2021-07-13 19:38:17,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:17,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:17,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:17,910 INFO L87 Difference]: Start difference. First operand 265 states and 817 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,074 INFO L93 Difference]: Finished difference Result 427 states and 1257 transitions. [2021-07-13 19:38:18,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:18,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:18,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,075 INFO L225 Difference]: With dead ends: 427 [2021-07-13 19:38:18,075 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:38:18,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:38:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 272. [2021-07-13 19:38:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.1180811808118083) internal successors, (845), 271 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 845 transitions. [2021-07-13 19:38:18,082 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 845 transitions. Word has length 18 [2021-07-13 19:38:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,082 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 845 transitions. [2021-07-13 19:38:18,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 845 transitions. [2021-07-13 19:38:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:18,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,083 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:38:18,307 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1415469208, now seen corresponding path program 16 times [2021-07-13 19:38:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064898671] [2021-07-13 19:38:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064898671] [2021-07-13 19:38:18,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064898671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:18,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596707722] [2021-07-13 19:38:18,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:18,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596707722] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:18,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:18,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:18,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855706435] [2021-07-13 19:38:18,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:18,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:18,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:18,486 INFO L87 Difference]: Start difference. First operand 272 states and 845 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:18,657 INFO L93 Difference]: Finished difference Result 468 states and 1355 transitions. [2021-07-13 19:38:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:18,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:18,659 INFO L225 Difference]: With dead ends: 468 [2021-07-13 19:38:18,659 INFO L226 Difference]: Without dead ends: 468 [2021-07-13 19:38:18,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-07-13 19:38:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 278. [2021-07-13 19:38:18,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 3.1407942238267146) internal successors, (870), 277 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 870 transitions. [2021-07-13 19:38:18,666 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 870 transitions. Word has length 18 [2021-07-13 19:38:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:18,666 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 870 transitions. [2021-07-13 19:38:18,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 870 transitions. [2021-07-13 19:38:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:18,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:18,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:18,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:18,881 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1385590366, now seen corresponding path program 17 times [2021-07-13 19:38:18,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:18,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7881109] [2021-07-13 19:38:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:18,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:18,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7881109] [2021-07-13 19:38:18,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7881109] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:18,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:18,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135440464] [2021-07-13 19:38:18,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:18,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:18,933 INFO L87 Difference]: Start difference. First operand 278 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,059 INFO L93 Difference]: Finished difference Result 400 states and 1209 transitions. [2021-07-13 19:38:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:19,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,060 INFO L225 Difference]: With dead ends: 400 [2021-07-13 19:38:19,061 INFO L226 Difference]: Without dead ends: 394 [2021-07-13 19:38:19,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-07-13 19:38:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 270. [2021-07-13 19:38:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-07-13 19:38:19,068 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-07-13 19:38:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,068 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-07-13 19:38:19,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-07-13 19:38:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:19,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,069 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-07-13 19:38:19,069 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1458534320, now seen corresponding path program 19 times [2021-07-13 19:38:19,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562671293] [2021-07-13 19:38:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562671293] [2021-07-13 19:38:19,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562671293] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:19,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:19,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214539193] [2021-07-13 19:38:19,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:19,115 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,280 INFO L93 Difference]: Finished difference Result 527 states and 1494 transitions. [2021-07-13 19:38:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,281 INFO L225 Difference]: With dead ends: 527 [2021-07-13 19:38:19,281 INFO L226 Difference]: Without dead ends: 509 [2021-07-13 19:38:19,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-07-13 19:38:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 274. [2021-07-13 19:38:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.1355311355311355) internal successors, (856), 273 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 856 transitions. [2021-07-13 19:38:19,289 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 856 transitions. Word has length 18 [2021-07-13 19:38:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,289 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 856 transitions. [2021-07-13 19:38:19,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 856 transitions. [2021-07-13 19:38:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:19,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,290 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-07-13 19:38:19,290 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash 5951976, now seen corresponding path program 20 times [2021-07-13 19:38:19,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253133453] [2021-07-13 19:38:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253133453] [2021-07-13 19:38:19,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253133453] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:19,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:19,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:19,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682231303] [2021-07-13 19:38:19,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:19,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:19,344 INFO L87 Difference]: Start difference. First operand 274 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,521 INFO L93 Difference]: Finished difference Result 517 states and 1473 transitions. [2021-07-13 19:38:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:19,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,522 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:38:19,522 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:38:19,522 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:19,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:38:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 285. [2021-07-13 19:38:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.1161971830985915) internal successors, (885), 284 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 885 transitions. [2021-07-13 19:38:19,530 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 885 transitions. Word has length 18 [2021-07-13 19:38:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,530 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 885 transitions. [2021-07-13 19:38:19,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 885 transitions. [2021-07-13 19:38:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:19,531 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-07-13 19:38:19,531 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,531 INFO L82 PathProgramCache]: Analyzing trace with hash -760894172, now seen corresponding path program 21 times [2021-07-13 19:38:19,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880957828] [2021-07-13 19:38:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880957828] [2021-07-13 19:38:19,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880957828] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:19,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:19,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:19,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269807943] [2021-07-13 19:38:19,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:19,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:19,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:19,581 INFO L87 Difference]: Start difference. First operand 285 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:19,731 INFO L93 Difference]: Finished difference Result 486 states and 1416 transitions. [2021-07-13 19:38:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:19,733 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:38:19,733 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:38:19,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:38:19,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 270. [2021-07-13 19:38:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-07-13 19:38:19,739 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-07-13 19:38:19,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:19,740 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-07-13 19:38:19,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:19,740 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-07-13 19:38:19,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:19,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:19,741 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:19,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-07-13 19:38:19,741 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:19,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:19,741 INFO L82 PathProgramCache]: Analyzing trace with hash -755535640, now seen corresponding path program 18 times [2021-07-13 19:38:19,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:19,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304279884] [2021-07-13 19:38:19,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:19,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304279884] [2021-07-13 19:38:19,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304279884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130442166] [2021-07-13 19:38:19,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:19,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:19,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:19,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:19,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130442166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:19,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:19,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-07-13 19:38:19,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077678510] [2021-07-13 19:38:19,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:19,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:19,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:19,948 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:20,256 INFO L93 Difference]: Finished difference Result 822 states and 2325 transitions. [2021-07-13 19:38:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:20,258 INFO L225 Difference]: With dead ends: 822 [2021-07-13 19:38:20,258 INFO L226 Difference]: Without dead ends: 822 [2021-07-13 19:38:20,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:38:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-07-13 19:38:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 276. [2021-07-13 19:38:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1636363636363636) internal successors, (870), 275 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 870 transitions. [2021-07-13 19:38:20,267 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 870 transitions. Word has length 18 [2021-07-13 19:38:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:20,267 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 870 transitions. [2021-07-13 19:38:20,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 870 transitions. [2021-07-13 19:38:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:20,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:20,268 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:20,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,489 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 877515752, now seen corresponding path program 19 times [2021-07-13 19:38:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:20,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898552504] [2021-07-13 19:38:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898552504] [2021-07-13 19:38:20,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898552504] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:20,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58786953] [2021-07-13 19:38:20,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:20,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:20,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58786953] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:20,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:20,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-07-13 19:38:20,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855448970] [2021-07-13 19:38:20,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:20,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:20,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:20,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:20,698 INFO L87 Difference]: Start difference. First operand 276 states and 870 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:20,848 INFO L93 Difference]: Finished difference Result 512 states and 1502 transitions. [2021-07-13 19:38:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:20,849 INFO L225 Difference]: With dead ends: 512 [2021-07-13 19:38:20,849 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:38:20,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:38:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 279. [2021-07-13 19:38:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.183453237410072) internal successors, (885), 278 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 885 transitions. [2021-07-13 19:38:20,855 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 885 transitions. Word has length 18 [2021-07-13 19:38:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 885 transitions. [2021-07-13 19:38:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 885 transitions. [2021-07-13 19:38:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:20,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:20,856 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-07-13 19:38:21,079 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1079621204, now seen corresponding path program 20 times [2021-07-13 19:38:21,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655046332] [2021-07-13 19:38:21,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655046332] [2021-07-13 19:38:21,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655046332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532337199] [2021-07-13 19:38:21,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:21,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:21,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532337199] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:21,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:21,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-07-13 19:38:21,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064582561] [2021-07-13 19:38:21,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:21,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:21,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:21,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:21,244 INFO L87 Difference]: Start difference. First operand 279 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,384 INFO L93 Difference]: Finished difference Result 479 states and 1425 transitions. [2021-07-13 19:38:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,385 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:38:21,386 INFO L226 Difference]: Without dead ends: 479 [2021-07-13 19:38:21,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:21,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-13 19:38:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 270. [2021-07-13 19:38:21,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 3.1449814126394053) internal successors, (846), 269 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 846 transitions. [2021-07-13 19:38:21,392 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 846 transitions. Word has length 18 [2021-07-13 19:38:21,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:21,392 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 846 transitions. [2021-07-13 19:38:21,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 846 transitions. [2021-07-13 19:38:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:21,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:21,393 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:21,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,608 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash 209328886, now seen corresponding path program 21 times [2021-07-13 19:38:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:21,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433856563] [2021-07-13 19:38:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:21,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433856563] [2021-07-13 19:38:21,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433856563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:21,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758384670] [2021-07-13 19:38:21,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:21,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:21,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:21,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758384670] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:21,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:21,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:21,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053340400] [2021-07-13 19:38:21,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:21,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:21,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:21,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:21,793 INFO L87 Difference]: Start difference. First operand 270 states and 846 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:21,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:21,993 INFO L93 Difference]: Finished difference Result 554 states and 1604 transitions. [2021-07-13 19:38:21,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:21,993 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:21,995 INFO L225 Difference]: With dead ends: 554 [2021-07-13 19:38:21,995 INFO L226 Difference]: Without dead ends: 554 [2021-07-13 19:38:21,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-07-13 19:38:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 274. [2021-07-13 19:38:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 3.161172161172161) internal successors, (863), 273 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 863 transitions. [2021-07-13 19:38:22,002 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 863 transitions. Word has length 18 [2021-07-13 19:38:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,003 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 863 transitions. [2021-07-13 19:38:22,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,003 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 863 transitions. [2021-07-13 19:38:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:22,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:22,217 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1284578836, now seen corresponding path program 22 times [2021-07-13 19:38:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550683905] [2021-07-13 19:38:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550683905] [2021-07-13 19:38:22,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550683905] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:22,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:22,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:22,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843454015] [2021-07-13 19:38:22,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:22,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:22,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:22,269 INFO L87 Difference]: Start difference. First operand 274 states and 863 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,383 INFO L93 Difference]: Finished difference Result 540 states and 1553 transitions. [2021-07-13 19:38:22,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,385 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:38:22,385 INFO L226 Difference]: Without dead ends: 534 [2021-07-13 19:38:22,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:22,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-07-13 19:38:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 280. [2021-07-13 19:38:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.150537634408602) internal successors, (879), 279 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 879 transitions. [2021-07-13 19:38:22,389 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 879 transitions. Word has length 18 [2021-07-13 19:38:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,389 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 879 transitions. [2021-07-13 19:38:22,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,389 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 879 transitions. [2021-07-13 19:38:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:22,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,390 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-07-13 19:38:22,390 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1824747200, now seen corresponding path program 22 times [2021-07-13 19:38:22,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144961647] [2021-07-13 19:38:22,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144961647] [2021-07-13 19:38:22,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144961647] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:22,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:22,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:22,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846769588] [2021-07-13 19:38:22,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:22,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:22,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:22,447 INFO L87 Difference]: Start difference. First operand 280 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,625 INFO L93 Difference]: Finished difference Result 543 states and 1546 transitions. [2021-07-13 19:38:22,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,626 INFO L225 Difference]: With dead ends: 543 [2021-07-13 19:38:22,626 INFO L226 Difference]: Without dead ends: 536 [2021-07-13 19:38:22,626 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-07-13 19:38:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 291. [2021-07-13 19:38:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1310344827586207) internal successors, (908), 290 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 908 transitions. [2021-07-13 19:38:22,633 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 908 transitions. Word has length 18 [2021-07-13 19:38:22,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,633 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 908 transitions. [2021-07-13 19:38:22,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 908 transitions. [2021-07-13 19:38:22,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:22,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,634 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-07-13 19:38:22,634 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash -102317272, now seen corresponding path program 23 times [2021-07-13 19:38:22,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086633996] [2021-07-13 19:38:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086633996] [2021-07-13 19:38:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086633996] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:22,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:22,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434403084] [2021-07-13 19:38:22,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:22,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:22,689 INFO L87 Difference]: Start difference. First operand 291 states and 908 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:22,860 INFO L93 Difference]: Finished difference Result 542 states and 1551 transitions. [2021-07-13 19:38:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:22,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:22,862 INFO L225 Difference]: With dead ends: 542 [2021-07-13 19:38:22,862 INFO L226 Difference]: Without dead ends: 542 [2021-07-13 19:38:22,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-07-13 19:38:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 289. [2021-07-13 19:38:22,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-07-13 19:38:22,869 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-07-13 19:38:22,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:22,869 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-07-13 19:38:22,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-07-13 19:38:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:22,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:22,870 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:22,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-07-13 19:38:22,871 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 960729324, now seen corresponding path program 23 times [2021-07-13 19:38:22,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:22,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475021989] [2021-07-13 19:38:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:22,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:22,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475021989] [2021-07-13 19:38:22,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475021989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:22,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143752020] [2021-07-13 19:38:22,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143752020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:23,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:23,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135547603] [2021-07-13 19:38:23,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:23,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:23,099 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,415 INFO L93 Difference]: Finished difference Result 752 states and 2121 transitions. [2021-07-13 19:38:23,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:23,416 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,417 INFO L225 Difference]: With dead ends: 752 [2021-07-13 19:38:23,417 INFO L226 Difference]: Without dead ends: 752 [2021-07-13 19:38:23,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:38:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-07-13 19:38:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 292. [2021-07-13 19:38:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.154639175257732) internal successors, (918), 291 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 918 transitions. [2021-07-13 19:38:23,423 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 918 transitions. Word has length 18 [2021-07-13 19:38:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:23,423 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 918 transitions. [2021-07-13 19:38:23,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 918 transitions. [2021-07-13 19:38:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:23,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:23,424 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:23,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:38:23,625 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2041895572, now seen corresponding path program 24 times [2021-07-13 19:38:23,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:23,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524816265] [2021-07-13 19:38:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:23,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524816265] [2021-07-13 19:38:23,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524816265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:23,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210044688] [2021-07-13 19:38:23,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:23,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:23,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:23,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:23,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210044688] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:23,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:23,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336272634] [2021-07-13 19:38:23,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:23,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:23,822 INFO L87 Difference]: Start difference. First operand 292 states and 918 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:23,955 INFO L93 Difference]: Finished difference Result 546 states and 1607 transitions. [2021-07-13 19:38:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:23,956 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:38:23,956 INFO L226 Difference]: Without dead ends: 546 [2021-07-13 19:38:23,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-07-13 19:38:23,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 289. [2021-07-13 19:38:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1354166666666665) internal successors, (903), 288 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 903 transitions. [2021-07-13 19:38:23,961 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 903 transitions. Word has length 18 [2021-07-13 19:38:23,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:23,961 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 903 transitions. [2021-07-13 19:38:23,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 903 transitions. [2021-07-13 19:38:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:23,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:23,962 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:24,168 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash 981465852, now seen corresponding path program 25 times [2021-07-13 19:38:24,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342312139] [2021-07-13 19:38:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342312139] [2021-07-13 19:38:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342312139] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014663044] [2021-07-13 19:38:24,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:24,218 INFO L87 Difference]: Start difference. First operand 289 states and 903 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,336 INFO L93 Difference]: Finished difference Result 506 states and 1473 transitions. [2021-07-13 19:38:24,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,336 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:24,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,337 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:38:24,337 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:38:24,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:24,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:38:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 293. [2021-07-13 19:38:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.1404109589041096) internal successors, (917), 292 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 917 transitions. [2021-07-13 19:38:24,344 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 917 transitions. Word has length 18 [2021-07-13 19:38:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,344 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 917 transitions. [2021-07-13 19:38:24,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 917 transitions. [2021-07-13 19:38:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:24,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,345 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-07-13 19:38:24,345 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,345 INFO L82 PathProgramCache]: Analyzing trace with hash -933958074, now seen corresponding path program 26 times [2021-07-13 19:38:24,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998464106] [2021-07-13 19:38:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998464106] [2021-07-13 19:38:24,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998464106] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:24,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883656941] [2021-07-13 19:38:24,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:24,405 INFO L87 Difference]: Start difference. First operand 293 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,531 INFO L93 Difference]: Finished difference Result 524 states and 1524 transitions. [2021-07-13 19:38:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,532 INFO L225 Difference]: With dead ends: 524 [2021-07-13 19:38:24,532 INFO L226 Difference]: Without dead ends: 524 [2021-07-13 19:38:24,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:24,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-07-13 19:38:24,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 291. [2021-07-13 19:38:24,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1448275862068966) internal successors, (912), 290 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 912 transitions. [2021-07-13 19:38:24,537 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 912 transitions. Word has length 18 [2021-07-13 19:38:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,537 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 912 transitions. [2021-07-13 19:38:24,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 912 transitions. [2021-07-13 19:38:24,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:24,538 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,538 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-07-13 19:38:24,538 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1193569328, now seen corresponding path program 24 times [2021-07-13 19:38:24,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379138051] [2021-07-13 19:38:24,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379138051] [2021-07-13 19:38:24,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379138051] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:24,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:24,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:24,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120073666] [2021-07-13 19:38:24,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:24,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:24,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:24,586 INFO L87 Difference]: Start difference. First operand 291 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,725 INFO L93 Difference]: Finished difference Result 518 states and 1506 transitions. [2021-07-13 19:38:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:24,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,726 INFO L225 Difference]: With dead ends: 518 [2021-07-13 19:38:24,726 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:38:24,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:24,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:38:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 276. [2021-07-13 19:38:24,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-07-13 19:38:24,731 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-07-13 19:38:24,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,731 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-07-13 19:38:24,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,731 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-07-13 19:38:24,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:24,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-07-13 19:38:24,732 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1775654886, now seen corresponding path program 25 times [2021-07-13 19:38:24,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929473300] [2021-07-13 19:38:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929473300] [2021-07-13 19:38:24,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929473300] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:24,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:24,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:24,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952530548] [2021-07-13 19:38:24,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:24,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:24,773 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:24,879 INFO L93 Difference]: Finished difference Result 413 states and 1194 transitions. [2021-07-13 19:38:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:24,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:24,880 INFO L225 Difference]: With dead ends: 413 [2021-07-13 19:38:24,880 INFO L226 Difference]: Without dead ends: 395 [2021-07-13 19:38:24,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-07-13 19:38:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 280. [2021-07-13 19:38:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.10752688172043) internal successors, (867), 279 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 867 transitions. [2021-07-13 19:38:24,885 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 867 transitions. Word has length 18 [2021-07-13 19:38:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:24,886 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 867 transitions. [2021-07-13 19:38:24,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:24,886 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 867 transitions. [2021-07-13 19:38:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:24,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:24,886 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:24,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-07-13 19:38:24,887 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1054826114, now seen corresponding path program 26 times [2021-07-13 19:38:24,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:24,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840700423] [2021-07-13 19:38:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:24,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:24,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840700423] [2021-07-13 19:38:24,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840700423] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:24,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:24,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:24,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047442186] [2021-07-13 19:38:24,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:24,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:24,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:24,930 INFO L87 Difference]: Start difference. First operand 280 states and 867 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,067 INFO L93 Difference]: Finished difference Result 434 states and 1236 transitions. [2021-07-13 19:38:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,068 INFO L225 Difference]: With dead ends: 434 [2021-07-13 19:38:25,068 INFO L226 Difference]: Without dead ends: 427 [2021-07-13 19:38:25,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-07-13 19:38:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 291. [2021-07-13 19:38:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.089655172413793) internal successors, (896), 290 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 896 transitions. [2021-07-13 19:38:25,075 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 896 transitions. Word has length 18 [2021-07-13 19:38:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,076 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 896 transitions. [2021-07-13 19:38:25,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 896 transitions. [2021-07-13 19:38:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:25,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,076 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-07-13 19:38:25,077 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1821672262, now seen corresponding path program 27 times [2021-07-13 19:38:25,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554377576] [2021-07-13 19:38:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554377576] [2021-07-13 19:38:25,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554377576] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:25,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:25,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:25,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565538459] [2021-07-13 19:38:25,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:25,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:25,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:25,118 INFO L87 Difference]: Start difference. First operand 291 states and 896 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,250 INFO L93 Difference]: Finished difference Result 403 states and 1179 transitions. [2021-07-13 19:38:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,251 INFO L225 Difference]: With dead ends: 403 [2021-07-13 19:38:25,251 INFO L226 Difference]: Without dead ends: 403 [2021-07-13 19:38:25,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:25,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-07-13 19:38:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 276. [2021-07-13 19:38:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 3.1163636363636362) internal successors, (857), 275 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 857 transitions. [2021-07-13 19:38:25,257 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 857 transitions. Word has length 18 [2021-07-13 19:38:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,257 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 857 transitions. [2021-07-13 19:38:25,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 857 transitions. [2021-07-13 19:38:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:25,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,258 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-07-13 19:38:25,258 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1488855460, now seen corresponding path program 28 times [2021-07-13 19:38:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573899907] [2021-07-13 19:38:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573899907] [2021-07-13 19:38:25,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573899907] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:25,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:25,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:25,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610242477] [2021-07-13 19:38:25,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:25,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:25,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:25,294 INFO L87 Difference]: Start difference. First operand 276 states and 857 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,416 INFO L93 Difference]: Finished difference Result 446 states and 1266 transitions. [2021-07-13 19:38:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:25,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,417 INFO L225 Difference]: With dead ends: 446 [2021-07-13 19:38:25,417 INFO L226 Difference]: Without dead ends: 439 [2021-07-13 19:38:25,417 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-07-13 19:38:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 291. [2021-07-13 19:38:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.0965517241379312) internal successors, (898), 290 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 898 transitions. [2021-07-13 19:38:25,423 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 898 transitions. Word has length 18 [2021-07-13 19:38:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,423 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 898 transitions. [2021-07-13 19:38:25,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 898 transitions. [2021-07-13 19:38:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:25,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,424 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-07-13 19:38:25,424 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2039265688, now seen corresponding path program 29 times [2021-07-13 19:38:25,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662452286] [2021-07-13 19:38:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662452286] [2021-07-13 19:38:25,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662452286] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:25,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:25,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:25,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203243979] [2021-07-13 19:38:25,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:25,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:25,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:25,462 INFO L87 Difference]: Start difference. First operand 291 states and 898 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,594 INFO L93 Difference]: Finished difference Result 445 states and 1271 transitions. [2021-07-13 19:38:25,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,595 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,595 INFO L225 Difference]: With dead ends: 445 [2021-07-13 19:38:25,596 INFO L226 Difference]: Without dead ends: 445 [2021-07-13 19:38:25,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-07-13 19:38:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 289. [2021-07-13 19:38:25,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1006944444444446) internal successors, (893), 288 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 893 transitions. [2021-07-13 19:38:25,602 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 893 transitions. Word has length 18 [2021-07-13 19:38:25,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,602 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 893 transitions. [2021-07-13 19:38:25,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 893 transitions. [2021-07-13 19:38:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:25,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,603 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-07-13 19:38:25,603 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1080210964, now seen corresponding path program 30 times [2021-07-13 19:38:25,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980679038] [2021-07-13 19:38:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980679038] [2021-07-13 19:38:25,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980679038] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:25,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:25,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:25,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334286485] [2021-07-13 19:38:25,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:25,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:25,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:25,636 INFO L87 Difference]: Start difference. First operand 289 states and 893 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:25,757 INFO L93 Difference]: Finished difference Result 419 states and 1219 transitions. [2021-07-13 19:38:25,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:25,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:25,758 INFO L225 Difference]: With dead ends: 419 [2021-07-13 19:38:25,758 INFO L226 Difference]: Without dead ends: 419 [2021-07-13 19:38:25,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:25,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-07-13 19:38:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 284. [2021-07-13 19:38:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0989399293286217) internal successors, (877), 283 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 877 transitions. [2021-07-13 19:38:25,764 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 877 transitions. Word has length 18 [2021-07-13 19:38:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:25,764 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 877 transitions. [2021-07-13 19:38:25,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 877 transitions. [2021-07-13 19:38:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:25,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:25,765 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:25,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-07-13 19:38:25,765 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2028469348, now seen corresponding path program 27 times [2021-07-13 19:38:25,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:25,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271501060] [2021-07-13 19:38:25,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271501060] [2021-07-13 19:38:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271501060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167613422] [2021-07-13 19:38:25,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:25,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:25,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:25,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:25,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167613422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:25,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:25,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-07-13 19:38:25,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571597856] [2021-07-13 19:38:25,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:38:25,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:25,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:38:25,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:25,930 INFO L87 Difference]: Start difference. First operand 284 states and 877 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:26,079 INFO L93 Difference]: Finished difference Result 475 states and 1391 transitions. [2021-07-13 19:38:26,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:26,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:26,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:26,080 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:38:26,080 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:38:26,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:38:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 280. [2021-07-13 19:38:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.078853046594982) internal successors, (859), 279 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 859 transitions. [2021-07-13 19:38:26,087 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 859 transitions. Word has length 18 [2021-07-13 19:38:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:26,087 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 859 transitions. [2021-07-13 19:38:26,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 859 transitions. [2021-07-13 19:38:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:26,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:26,088 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:26,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,311 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:26,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:26,311 INFO L82 PathProgramCache]: Analyzing trace with hash -395417956, now seen corresponding path program 28 times [2021-07-13 19:38:26,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:26,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051196610] [2021-07-13 19:38:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051196610] [2021-07-13 19:38:26,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051196610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267710617] [2021-07-13 19:38:26,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:26,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:26,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267710617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:26,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633794162] [2021-07-13 19:38:26,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:26,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:26,471 INFO L87 Difference]: Start difference. First operand 280 states and 859 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:26,582 INFO L93 Difference]: Finished difference Result 479 states and 1383 transitions. [2021-07-13 19:38:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:26,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:26,584 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:38:26,584 INFO L226 Difference]: Without dead ends: 479 [2021-07-13 19:38:26,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-07-13 19:38:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 279. [2021-07-13 19:38:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.0719424460431655) internal successors, (854), 278 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 854 transitions. [2021-07-13 19:38:26,588 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 854 transitions. Word has length 18 [2021-07-13 19:38:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:26,589 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 854 transitions. [2021-07-13 19:38:26,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 854 transitions. [2021-07-13 19:38:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:26,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:26,589 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:26,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,813 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1942412384, now seen corresponding path program 29 times [2021-07-13 19:38:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:26,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437213455] [2021-07-13 19:38:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:26,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437213455] [2021-07-13 19:38:26,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437213455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494536713] [2021-07-13 19:38:26,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:26,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:26,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:26,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:26,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494536713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:26,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:26,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 19:38:26,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941191795] [2021-07-13 19:38:26,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:38:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:38:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:26,961 INFO L87 Difference]: Start difference. First operand 279 states and 854 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,075 INFO L93 Difference]: Finished difference Result 436 states and 1286 transitions. [2021-07-13 19:38:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,076 INFO L225 Difference]: With dead ends: 436 [2021-07-13 19:38:27,077 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:38:27,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:27,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:38:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 262. [2021-07-13 19:38:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 3.0383141762452106) internal successors, (793), 261 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 793 transitions. [2021-07-13 19:38:27,080 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 793 transitions. Word has length 18 [2021-07-13 19:38:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,081 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 793 transitions. [2021-07-13 19:38:27,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,081 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 793 transitions. [2021-07-13 19:38:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:27,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,081 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 19:38:27,282 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1829110872, now seen corresponding path program 30 times [2021-07-13 19:38:27,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748616516] [2021-07-13 19:38:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748616516] [2021-07-13 19:38:27,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748616516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467292545] [2021-07-13 19:38:27,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:27,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467292545] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:27,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:27,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-07-13 19:38:27,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27019760] [2021-07-13 19:38:27,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:27,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:27,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:27,430 INFO L87 Difference]: Start difference. First operand 262 states and 793 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,530 INFO L93 Difference]: Finished difference Result 450 states and 1301 transitions. [2021-07-13 19:38:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,531 INFO L225 Difference]: With dead ends: 450 [2021-07-13 19:38:27,531 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:38:27,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:38:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 268. [2021-07-13 19:38:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 3.0711610486891385) internal successors, (820), 267 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 820 transitions. [2021-07-13 19:38:27,535 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 820 transitions. Word has length 18 [2021-07-13 19:38:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:27,535 INFO L482 AbstractCegarLoop]: Abstraction has 268 states and 820 transitions. [2021-07-13 19:38:27,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,535 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 820 transitions. [2021-07-13 19:38:27,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:27,535 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:27,536 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:27,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 19:38:27,736 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:27,736 INFO L82 PathProgramCache]: Analyzing trace with hash 508719468, now seen corresponding path program 31 times [2021-07-13 19:38:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138793139] [2021-07-13 19:38:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138793139] [2021-07-13 19:38:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138793139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:27,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413468950] [2021-07-13 19:38:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:27,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:27,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413468950] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:27,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:27,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-07-13 19:38:27,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056347351] [2021-07-13 19:38:27,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:27,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:27,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:27,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:27,881 INFO L87 Difference]: Start difference. First operand 268 states and 820 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:27,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:27,998 INFO L93 Difference]: Finished difference Result 456 states and 1316 transitions. [2021-07-13 19:38:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:27,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:27,999 INFO L225 Difference]: With dead ends: 456 [2021-07-13 19:38:27,999 INFO L226 Difference]: Without dead ends: 456 [2021-07-13 19:38:28,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:38:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-07-13 19:38:28,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 265. [2021-07-13 19:38:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 3.0492424242424243) internal successors, (805), 264 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 805 transitions. [2021-07-13 19:38:28,005 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 805 transitions. Word has length 18 [2021-07-13 19:38:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:28,005 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 805 transitions. [2021-07-13 19:38:28,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 805 transitions. [2021-07-13 19:38:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:28,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:28,006 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,213 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2122286202, now seen corresponding path program 32 times [2021-07-13 19:38:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349907316] [2021-07-13 19:38:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349907316] [2021-07-13 19:38:28,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349907316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480825250] [2021-07-13 19:38:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:28,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:28,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:28,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480825250] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:28,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:28,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2021-07-13 19:38:28,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503351026] [2021-07-13 19:38:28,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:28,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:28,336 INFO L87 Difference]: Start difference. First operand 265 states and 805 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:28,440 INFO L93 Difference]: Finished difference Result 414 states and 1209 transitions. [2021-07-13 19:38:28,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:28,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:28,441 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:38:28,441 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:38:28,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:38:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 267. [2021-07-13 19:38:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.0526315789473686) internal successors, (812), 266 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 812 transitions. [2021-07-13 19:38:28,449 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 812 transitions. Word has length 18 [2021-07-13 19:38:28,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:28,449 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 812 transitions. [2021-07-13 19:38:28,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,449 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 812 transitions. [2021-07-13 19:38:28,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:28,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:28,450 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,651 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1312639000, now seen corresponding path program 31 times [2021-07-13 19:38:28,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357084849] [2021-07-13 19:38:28,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357084849] [2021-07-13 19:38:28,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357084849] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:28,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:28,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:28,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713458763] [2021-07-13 19:38:28,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:28,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:28,708 INFO L87 Difference]: Start difference. First operand 267 states and 812 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:28,833 INFO L93 Difference]: Finished difference Result 546 states and 1555 transitions. [2021-07-13 19:38:28,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:28,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:28,835 INFO L225 Difference]: With dead ends: 546 [2021-07-13 19:38:28,835 INFO L226 Difference]: Without dead ends: 539 [2021-07-13 19:38:28,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-07-13 19:38:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 284. [2021-07-13 19:38:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.088339222614841) internal successors, (874), 283 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 874 transitions. [2021-07-13 19:38:28,841 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 874 transitions. Word has length 18 [2021-07-13 19:38:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:28,841 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 874 transitions. [2021-07-13 19:38:28,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 874 transitions. [2021-07-13 19:38:28,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:28,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:28,842 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:28,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-07-13 19:38:28,842 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:28,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:28,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1487916058, now seen corresponding path program 33 times [2021-07-13 19:38:28,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:28,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393436693] [2021-07-13 19:38:28,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:28,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:28,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393436693] [2021-07-13 19:38:28,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393436693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:28,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174322258] [2021-07-13 19:38:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:28,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:28,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:28,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174322258] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:29,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:29,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:29,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111137950] [2021-07-13 19:38:29,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:29,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:29,029 INFO L87 Difference]: Start difference. First operand 284 states and 874 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,159 INFO L93 Difference]: Finished difference Result 500 states and 1465 transitions. [2021-07-13 19:38:29,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:29,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,160 INFO L225 Difference]: With dead ends: 500 [2021-07-13 19:38:29,160 INFO L226 Difference]: Without dead ends: 500 [2021-07-13 19:38:29,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:29,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-07-13 19:38:29,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 289. [2021-07-13 19:38:29,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1215277777777777) internal successors, (899), 288 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 899 transitions. [2021-07-13 19:38:29,164 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 899 transitions. Word has length 18 [2021-07-13 19:38:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,164 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 899 transitions. [2021-07-13 19:38:29,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,164 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 899 transitions. [2021-07-13 19:38:29,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:29,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,165 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:38:29,366 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1313143516, now seen corresponding path program 34 times [2021-07-13 19:38:29,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810362016] [2021-07-13 19:38:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810362016] [2021-07-13 19:38:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810362016] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:29,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:29,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:29,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377900295] [2021-07-13 19:38:29,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:29,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:29,422 INFO L87 Difference]: Start difference. First operand 289 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,515 INFO L93 Difference]: Finished difference Result 486 states and 1414 transitions. [2021-07-13 19:38:29,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:29,515 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:29,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,516 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:38:29,516 INFO L226 Difference]: Without dead ends: 480 [2021-07-13 19:38:29,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-07-13 19:38:29,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 295. [2021-07-13 19:38:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0918367346938775) internal successors, (909), 294 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 909 transitions. [2021-07-13 19:38:29,522 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 909 transitions. Word has length 18 [2021-07-13 19:38:29,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,523 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 909 transitions. [2021-07-13 19:38:29,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,523 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 909 transitions. [2021-07-13 19:38:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:29,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,523 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-07-13 19:38:29,524 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash -127799318, now seen corresponding path program 32 times [2021-07-13 19:38:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049900089] [2021-07-13 19:38:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049900089] [2021-07-13 19:38:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049900089] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:29,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:29,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:29,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717173595] [2021-07-13 19:38:29,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:29,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:29,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:29,576 INFO L87 Difference]: Start difference. First operand 295 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,689 INFO L93 Difference]: Finished difference Result 566 states and 1625 transitions. [2021-07-13 19:38:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,691 INFO L225 Difference]: With dead ends: 566 [2021-07-13 19:38:29,691 INFO L226 Difference]: Without dead ends: 566 [2021-07-13 19:38:29,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:29,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-07-13 19:38:29,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 292. [2021-07-13 19:38:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.0962199312714778) internal successors, (901), 291 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 901 transitions. [2021-07-13 19:38:29,697 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 901 transitions. Word has length 18 [2021-07-13 19:38:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,698 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 901 transitions. [2021-07-13 19:38:29,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 901 transitions. [2021-07-13 19:38:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:29,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,698 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-07-13 19:38:29,699 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,699 INFO L82 PathProgramCache]: Analyzing trace with hash 127502256, now seen corresponding path program 33 times [2021-07-13 19:38:29,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550060947] [2021-07-13 19:38:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550060947] [2021-07-13 19:38:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550060947] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:29,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:29,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:29,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011789069] [2021-07-13 19:38:29,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:29,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:29,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:29,749 INFO L87 Difference]: Start difference. First operand 292 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:29,914 INFO L93 Difference]: Finished difference Result 592 states and 1667 transitions. [2021-07-13 19:38:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:29,915 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:38:29,915 INFO L226 Difference]: Without dead ends: 585 [2021-07-13 19:38:29,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-07-13 19:38:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 296. [2021-07-13 19:38:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1016949152542375) internal successors, (915), 295 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 915 transitions. [2021-07-13 19:38:29,921 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 915 transitions. Word has length 18 [2021-07-13 19:38:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:29,921 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 915 transitions. [2021-07-13 19:38:29,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 915 transitions. [2021-07-13 19:38:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:29,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:29,922 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:29,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-07-13 19:38:29,922 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:29,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:29,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1799562216, now seen corresponding path program 34 times [2021-07-13 19:38:29,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:29,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953690054] [2021-07-13 19:38:29,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:29,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:29,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953690054] [2021-07-13 19:38:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953690054] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:29,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:29,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214710407] [2021-07-13 19:38:29,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:29,970 INFO L87 Difference]: Start difference. First operand 296 states and 915 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:30,133 INFO L93 Difference]: Finished difference Result 567 states and 1631 transitions. [2021-07-13 19:38:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:30,134 INFO L225 Difference]: With dead ends: 567 [2021-07-13 19:38:30,135 INFO L226 Difference]: Without dead ends: 567 [2021-07-13 19:38:30,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-07-13 19:38:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 294. [2021-07-13 19:38:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-07-13 19:38:30,141 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-07-13 19:38:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:30,142 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-07-13 19:38:30,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-07-13 19:38:30,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:30,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:30,142 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:30,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-07-13 19:38:30,143 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash -736515620, now seen corresponding path program 35 times [2021-07-13 19:38:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:30,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111404763] [2021-07-13 19:38:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111404763] [2021-07-13 19:38:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111404763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133864344] [2021-07-13 19:38:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:30,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:30,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:30,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:30,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133864344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:30,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:30,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-07-13 19:38:30,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114291786] [2021-07-13 19:38:30,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:38:30,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:38:30,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:30,381 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:30,792 INFO L93 Difference]: Finished difference Result 756 states and 2106 transitions. [2021-07-13 19:38:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:30,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:30,794 INFO L225 Difference]: With dead ends: 756 [2021-07-13 19:38:30,794 INFO L226 Difference]: Without dead ends: 756 [2021-07-13 19:38:30,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:30,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-07-13 19:38:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 297. [2021-07-13 19:38:30,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.125) internal successors, (925), 296 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 925 transitions. [2021-07-13 19:38:30,800 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 925 transitions. Word has length 18 [2021-07-13 19:38:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:30,800 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 925 transitions. [2021-07-13 19:38:30,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 925 transitions. [2021-07-13 19:38:30,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:30,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:30,800 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:31,001 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,001 INFO L82 PathProgramCache]: Analyzing trace with hash 555826780, now seen corresponding path program 36 times [2021-07-13 19:38:31,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118870661] [2021-07-13 19:38:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118870661] [2021-07-13 19:38:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118870661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:31,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103596262] [2021-07-13 19:38:31,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:31,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:31,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:31,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:31,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103596262] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:31,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:31,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:31,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855192676] [2021-07-13 19:38:31,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:31,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:31,204 INFO L87 Difference]: Start difference. First operand 297 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:31,371 INFO L93 Difference]: Finished difference Result 528 states and 1554 transitions. [2021-07-13 19:38:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:31,373 INFO L225 Difference]: With dead ends: 528 [2021-07-13 19:38:31,373 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:38:31,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:38:31,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 294. [2021-07-13 19:38:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.10580204778157) internal successors, (910), 293 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 910 transitions. [2021-07-13 19:38:31,379 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 910 transitions. Word has length 18 [2021-07-13 19:38:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:31,379 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 910 transitions. [2021-07-13 19:38:31,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 910 transitions. [2021-07-13 19:38:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:31,380 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:31,380 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:38:31,593 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash -715779092, now seen corresponding path program 37 times [2021-07-13 19:38:31,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502681114] [2021-07-13 19:38:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502681114] [2021-07-13 19:38:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502681114] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:31,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:31,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:31,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852449471] [2021-07-13 19:38:31,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:31,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:31,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:31,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:31,643 INFO L87 Difference]: Start difference. First operand 294 states and 910 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:31,778 INFO L93 Difference]: Finished difference Result 525 states and 1502 transitions. [2021-07-13 19:38:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:31,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:31,779 INFO L225 Difference]: With dead ends: 525 [2021-07-13 19:38:31,779 INFO L226 Difference]: Without dead ends: 519 [2021-07-13 19:38:31,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-07-13 19:38:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 298. [2021-07-13 19:38:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.111111111111111) internal successors, (924), 297 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 924 transitions. [2021-07-13 19:38:31,788 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 924 transitions. Word has length 18 [2021-07-13 19:38:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:31,788 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 924 transitions. [2021-07-13 19:38:31,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:31,788 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 924 transitions. [2021-07-13 19:38:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:31,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:31,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:31,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-07-13 19:38:31,789 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1663764278, now seen corresponding path program 38 times [2021-07-13 19:38:31,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:31,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593193467] [2021-07-13 19:38:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:31,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:31,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:31,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593193467] [2021-07-13 19:38:31,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593193467] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:31,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:31,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:31,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985931773] [2021-07-13 19:38:31,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:31,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:31,851 INFO L87 Difference]: Start difference. First operand 298 states and 924 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,013 INFO L93 Difference]: Finished difference Result 531 states and 1503 transitions. [2021-07-13 19:38:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,015 INFO L225 Difference]: With dead ends: 531 [2021-07-13 19:38:32,015 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:38:32,015 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:38:32,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-07-13 19:38:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.1152542372881356) internal successors, (919), 295 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 919 transitions. [2021-07-13 19:38:32,021 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 919 transitions. Word has length 18 [2021-07-13 19:38:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,021 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 919 transitions. [2021-07-13 19:38:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 919 transitions. [2021-07-13 19:38:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:32,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,022 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-07-13 19:38:32,022 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash -220184744, now seen corresponding path program 35 times [2021-07-13 19:38:32,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138587266] [2021-07-13 19:38:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138587266] [2021-07-13 19:38:32,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138587266] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:32,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:32,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:32,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109368765] [2021-07-13 19:38:32,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:32,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:32,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:32,077 INFO L87 Difference]: Start difference. First operand 296 states and 919 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,180 INFO L93 Difference]: Finished difference Result 638 states and 1819 transitions. [2021-07-13 19:38:32,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:32,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,181 INFO L225 Difference]: With dead ends: 638 [2021-07-13 19:38:32,181 INFO L226 Difference]: Without dead ends: 638 [2021-07-13 19:38:32,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-13 19:38:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 299. [2021-07-13 19:38:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.134228187919463) internal successors, (934), 298 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 934 transitions. [2021-07-13 19:38:32,186 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 934 transitions. Word has length 18 [2021-07-13 19:38:32,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,186 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 934 transitions. [2021-07-13 19:38:32,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,186 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 934 transitions. [2021-07-13 19:38:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:32,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,187 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-07-13 19:38:32,187 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1404153024, now seen corresponding path program 36 times [2021-07-13 19:38:32,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603428239] [2021-07-13 19:38:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603428239] [2021-07-13 19:38:32,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603428239] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:32,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:32,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:32,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287528002] [2021-07-13 19:38:32,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:32,241 INFO L87 Difference]: Start difference. First operand 299 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,387 INFO L93 Difference]: Finished difference Result 599 states and 1729 transitions. [2021-07-13 19:38:32,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,389 INFO L225 Difference]: With dead ends: 599 [2021-07-13 19:38:32,389 INFO L226 Difference]: Without dead ends: 599 [2021-07-13 19:38:32,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:32,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-07-13 19:38:32,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 295. [2021-07-13 19:38:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.1054421768707483) internal successors, (913), 294 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 913 transitions. [2021-07-13 19:38:32,396 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 913 transitions. Word has length 18 [2021-07-13 19:38:32,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,396 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 913 transitions. [2021-07-13 19:38:32,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,396 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 913 transitions. [2021-07-13 19:38:32,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:32,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,397 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-07-13 19:38:32,397 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1984926374, now seen corresponding path program 37 times [2021-07-13 19:38:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026182314] [2021-07-13 19:38:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026182314] [2021-07-13 19:38:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026182314] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491069875] [2021-07-13 19:38:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:32,439 INFO L87 Difference]: Start difference. First operand 295 states and 913 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,593 INFO L93 Difference]: Finished difference Result 556 states and 1586 transitions. [2021-07-13 19:38:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:32,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,595 INFO L225 Difference]: With dead ends: 556 [2021-07-13 19:38:32,595 INFO L226 Difference]: Without dead ends: 549 [2021-07-13 19:38:32,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-07-13 19:38:32,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 303. [2021-07-13 19:38:32,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.109271523178808) internal successors, (939), 302 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 939 transitions. [2021-07-13 19:38:32,606 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 939 transitions. Word has length 18 [2021-07-13 19:38:32,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,606 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 939 transitions. [2021-07-13 19:38:32,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 939 transitions. [2021-07-13 19:38:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:32,606 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,606 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-07-13 19:38:32,607 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,607 INFO L82 PathProgramCache]: Analyzing trace with hash 382976450, now seen corresponding path program 38 times [2021-07-13 19:38:32,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544437496] [2021-07-13 19:38:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544437496] [2021-07-13 19:38:32,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544437496] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:32,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:32,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868360309] [2021-07-13 19:38:32,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:32,657 INFO L87 Difference]: Start difference. First operand 303 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,810 INFO L93 Difference]: Finished difference Result 555 states and 1591 transitions. [2021-07-13 19:38:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:32,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:32,811 INFO L225 Difference]: With dead ends: 555 [2021-07-13 19:38:32,811 INFO L226 Difference]: Without dead ends: 555 [2021-07-13 19:38:32,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-07-13 19:38:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 299. [2021-07-13 19:38:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.1040268456375837) internal successors, (925), 298 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 925 transitions. [2021-07-13 19:38:32,818 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 925 transitions. Word has length 18 [2021-07-13 19:38:32,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:32,818 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 925 transitions. [2021-07-13 19:38:32,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,818 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 925 transitions. [2021-07-13 19:38:32,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:32,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:32,819 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:32,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-07-13 19:38:32,819 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash -2139163544, now seen corresponding path program 39 times [2021-07-13 19:38:32,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:32,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984354557] [2021-07-13 19:38:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:32,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:32,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984354557] [2021-07-13 19:38:32,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984354557] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:32,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:32,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:32,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878763230] [2021-07-13 19:38:32,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:32,860 INFO L87 Difference]: Start difference. First operand 299 states and 925 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:32,999 INFO L93 Difference]: Finished difference Result 571 states and 1638 transitions. [2021-07-13 19:38:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:32,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:33,000 INFO L225 Difference]: With dead ends: 571 [2021-07-13 19:38:33,000 INFO L226 Difference]: Without dead ends: 571 [2021-07-13 19:38:33,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-07-13 19:38:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 297. [2021-07-13 19:38:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.108108108108108) internal successors, (920), 296 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 920 transitions. [2021-07-13 19:38:33,007 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 920 transitions. Word has length 18 [2021-07-13 19:38:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:33,007 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 920 transitions. [2021-07-13 19:38:33,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 920 transitions. [2021-07-13 19:38:33,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:33,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:33,008 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:33,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-07-13 19:38:33,008 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:33,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:33,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1023537320, now seen corresponding path program 39 times [2021-07-13 19:38:33,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:33,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554931059] [2021-07-13 19:38:33,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554931059] [2021-07-13 19:38:33,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554931059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627672546] [2021-07-13 19:38:33,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:33,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627672546] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:33,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:33,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:33,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778559776] [2021-07-13 19:38:33,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:33,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:33,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:33,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:33,201 INFO L87 Difference]: Start difference. First operand 297 states and 920 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:33,311 INFO L93 Difference]: Finished difference Result 521 states and 1542 transitions. [2021-07-13 19:38:33,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:33,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:33,313 INFO L225 Difference]: With dead ends: 521 [2021-07-13 19:38:33,313 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:38:33,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:38:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 298. [2021-07-13 19:38:33,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.1043771043771042) internal successors, (922), 297 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 922 transitions. [2021-07-13 19:38:33,319 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 922 transitions. Word has length 18 [2021-07-13 19:38:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:33,319 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 922 transitions. [2021-07-13 19:38:33,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 922 transitions. [2021-07-13 19:38:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:33,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:33,319 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:33,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:38:33,520 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:33,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1979087576, now seen corresponding path program 40 times [2021-07-13 19:38:33,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:33,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693235358] [2021-07-13 19:38:33,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693235358] [2021-07-13 19:38:33,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693235358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145381931] [2021-07-13 19:38:33,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:33,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:33,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:33,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:33,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145381931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:33,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:33,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:33,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052581764] [2021-07-13 19:38:33,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:33,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:33,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:33,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:33,694 INFO L87 Difference]: Start difference. First operand 298 states and 922 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:33,897 INFO L93 Difference]: Finished difference Result 640 states and 1839 transitions. [2021-07-13 19:38:33,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:33,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:33,898 INFO L225 Difference]: With dead ends: 640 [2021-07-13 19:38:33,898 INFO L226 Difference]: Without dead ends: 640 [2021-07-13 19:38:33,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-07-13 19:38:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 287. [2021-07-13 19:38:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0944055944055946) internal successors, (885), 286 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 885 transitions. [2021-07-13 19:38:33,903 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 885 transitions. Word has length 18 [2021-07-13 19:38:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:33,903 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 885 transitions. [2021-07-13 19:38:33,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:33,903 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 885 transitions. [2021-07-13 19:38:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:33,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:33,903 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:34,104 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1938415430, now seen corresponding path program 41 times [2021-07-13 19:38:34,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478888090] [2021-07-13 19:38:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478888090] [2021-07-13 19:38:34,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478888090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:34,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231240615] [2021-07-13 19:38:34,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:34,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231240615] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:34,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:34,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:34,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349209326] [2021-07-13 19:38:34,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:34,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:34,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:34,261 INFO L87 Difference]: Start difference. First operand 287 states and 885 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:34,376 INFO L93 Difference]: Finished difference Result 511 states and 1498 transitions. [2021-07-13 19:38:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:34,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:34,377 INFO L225 Difference]: With dead ends: 511 [2021-07-13 19:38:34,377 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:38:34,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:38:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-07-13 19:38:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.0848056537102475) internal successors, (873), 283 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 873 transitions. [2021-07-13 19:38:34,382 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 873 transitions. Word has length 18 [2021-07-13 19:38:34,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:34,382 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 873 transitions. [2021-07-13 19:38:34,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,382 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 873 transitions. [2021-07-13 19:38:34,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:34,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:34,382 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:38:34,583 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash -223183330, now seen corresponding path program 42 times [2021-07-13 19:38:34,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548494586] [2021-07-13 19:38:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548494586] [2021-07-13 19:38:34,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548494586] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:34,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:34,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:34,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601928818] [2021-07-13 19:38:34,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:34,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:34,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:34,622 INFO L87 Difference]: Start difference. First operand 284 states and 873 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:34,717 INFO L93 Difference]: Finished difference Result 422 states and 1234 transitions. [2021-07-13 19:38:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:34,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:34,718 INFO L225 Difference]: With dead ends: 422 [2021-07-13 19:38:34,718 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:38:34,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:38:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 298. [2021-07-13 19:38:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0707070707070705) internal successors, (912), 297 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 912 transitions. [2021-07-13 19:38:34,723 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 912 transitions. Word has length 18 [2021-07-13 19:38:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:34,724 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 912 transitions. [2021-07-13 19:38:34,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 912 transitions. [2021-07-13 19:38:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:34,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:34,726 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2021-07-13 19:38:34,726 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2138607256, now seen corresponding path program 43 times [2021-07-13 19:38:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283553726] [2021-07-13 19:38:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283553726] [2021-07-13 19:38:34,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283553726] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:34,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:34,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:34,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228797226] [2021-07-13 19:38:34,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:34,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:34,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:34,787 INFO L87 Difference]: Start difference. First operand 298 states and 912 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:34,907 INFO L93 Difference]: Finished difference Result 462 states and 1340 transitions. [2021-07-13 19:38:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:34,909 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:38:34,909 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:38:34,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:38:34,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 296. [2021-07-13 19:38:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 3.074576271186441) internal successors, (907), 295 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 907 transitions. [2021-07-13 19:38:34,915 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 907 transitions. Word has length 18 [2021-07-13 19:38:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:34,915 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 907 transitions. [2021-07-13 19:38:34,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 907 transitions. [2021-07-13 19:38:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:34,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:34,917 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:34,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2021-07-13 19:38:34,917 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:34,917 INFO L82 PathProgramCache]: Analyzing trace with hash 827662620, now seen corresponding path program 44 times [2021-07-13 19:38:34,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:34,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476923338] [2021-07-13 19:38:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:34,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:34,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:34,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476923338] [2021-07-13 19:38:34,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476923338] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:34,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:34,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:34,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260548331] [2021-07-13 19:38:34,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:34,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:34,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:34,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:34,974 INFO L87 Difference]: Start difference. First operand 296 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,130 INFO L93 Difference]: Finished difference Result 442 states and 1284 transitions. [2021-07-13 19:38:35,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:35,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:35,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,131 INFO L225 Difference]: With dead ends: 442 [2021-07-13 19:38:35,131 INFO L226 Difference]: Without dead ends: 442 [2021-07-13 19:38:35,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-07-13 19:38:35,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 286. [2021-07-13 19:38:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.0807017543859647) internal successors, (878), 285 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 878 transitions. [2021-07-13 19:38:35,136 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 878 transitions. Word has length 18 [2021-07-13 19:38:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,136 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 878 transitions. [2021-07-13 19:38:35,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,136 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 878 transitions. [2021-07-13 19:38:35,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:35,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,137 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2021-07-13 19:38:35,137 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -150074708, now seen corresponding path program 40 times [2021-07-13 19:38:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481014737] [2021-07-13 19:38:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481014737] [2021-07-13 19:38:35,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481014737] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:35,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:35,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:35,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923487952] [2021-07-13 19:38:35,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:35,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:35,193 INFO L87 Difference]: Start difference. First operand 286 states and 878 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,313 INFO L93 Difference]: Finished difference Result 508 states and 1470 transitions. [2021-07-13 19:38:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,314 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:38:35,315 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:38:35,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:35,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:38:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 287. [2021-07-13 19:38:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.076923076923077) internal successors, (880), 286 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 880 transitions. [2021-07-13 19:38:35,321 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 880 transitions. Word has length 18 [2021-07-13 19:38:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,321 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 880 transitions. [2021-07-13 19:38:35,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,321 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 880 transitions. [2021-07-13 19:38:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:35,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,321 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2021-07-13 19:38:35,322 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1474263060, now seen corresponding path program 41 times [2021-07-13 19:38:35,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506290330] [2021-07-13 19:38:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506290330] [2021-07-13 19:38:35,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506290330] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:35,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:35,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792002224] [2021-07-13 19:38:35,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:35,369 INFO L87 Difference]: Start difference. First operand 287 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,510 INFO L93 Difference]: Finished difference Result 511 states and 1476 transitions. [2021-07-13 19:38:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:35,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:35,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,511 INFO L225 Difference]: With dead ends: 511 [2021-07-13 19:38:35,511 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:38:35,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:38:35,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 284. [2021-07-13 19:38:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.056537102473498) internal successors, (865), 283 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 865 transitions. [2021-07-13 19:38:35,515 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 865 transitions. Word has length 18 [2021-07-13 19:38:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,515 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 865 transitions. [2021-07-13 19:38:35,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,515 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 865 transitions. [2021-07-13 19:38:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:35,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,516 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2021-07-13 19:38:35,516 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1780468438, now seen corresponding path program 42 times [2021-07-13 19:38:35,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260151881] [2021-07-13 19:38:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260151881] [2021-07-13 19:38:35,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260151881] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:35,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:35,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:35,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576597246] [2021-07-13 19:38:35,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:35,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:35,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:35,561 INFO L87 Difference]: Start difference. First operand 284 states and 865 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,702 INFO L93 Difference]: Finished difference Result 502 states and 1444 transitions. [2021-07-13 19:38:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,703 INFO L225 Difference]: With dead ends: 502 [2021-07-13 19:38:35,703 INFO L226 Difference]: Without dead ends: 502 [2021-07-13 19:38:35,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-07-13 19:38:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 273. [2021-07-13 19:38:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.0661764705882355) internal successors, (834), 272 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 834 transitions. [2021-07-13 19:38:35,709 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 834 transitions. Word has length 18 [2021-07-13 19:38:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,709 INFO L482 AbstractCegarLoop]: Abstraction has 273 states and 834 transitions. [2021-07-13 19:38:35,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 834 transitions. [2021-07-13 19:38:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:35,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,709 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2021-07-13 19:38:35,710 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,710 INFO L82 PathProgramCache]: Analyzing trace with hash -388587486, now seen corresponding path program 43 times [2021-07-13 19:38:35,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085733379] [2021-07-13 19:38:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085733379] [2021-07-13 19:38:35,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085733379] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:35,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:35,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:35,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816843718] [2021-07-13 19:38:35,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:35,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:35,750 INFO L87 Difference]: Start difference. First operand 273 states and 834 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:35,898 INFO L93 Difference]: Finished difference Result 421 states and 1245 transitions. [2021-07-13 19:38:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:35,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:35,899 INFO L225 Difference]: With dead ends: 421 [2021-07-13 19:38:35,899 INFO L226 Difference]: Without dead ends: 414 [2021-07-13 19:38:35,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-13 19:38:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2021-07-13 19:38:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.069204152249135) internal successors, (887), 289 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 887 transitions. [2021-07-13 19:38:35,905 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 887 transitions. Word has length 18 [2021-07-13 19:38:35,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:35,905 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 887 transitions. [2021-07-13 19:38:35,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:35,905 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 887 transitions. [2021-07-13 19:38:35,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:35,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:35,906 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:35,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2021-07-13 19:38:35,906 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1829025804, now seen corresponding path program 44 times [2021-07-13 19:38:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:35,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710562822] [2021-07-13 19:38:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:35,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710562822] [2021-07-13 19:38:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710562822] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:35,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:35,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:35,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721381711] [2021-07-13 19:38:35,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:35,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:35,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:35,948 INFO L87 Difference]: Start difference. First operand 290 states and 887 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,093 INFO L93 Difference]: Finished difference Result 423 states and 1258 transitions. [2021-07-13 19:38:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,094 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,095 INFO L225 Difference]: With dead ends: 423 [2021-07-13 19:38:36,095 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:38:36,095 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:38:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 287. [2021-07-13 19:38:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.0734265734265733) internal successors, (879), 286 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 879 transitions. [2021-07-13 19:38:36,100 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 879 transitions. Word has length 18 [2021-07-13 19:38:36,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,100 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 879 transitions. [2021-07-13 19:38:36,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,100 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 879 transitions. [2021-07-13 19:38:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,101 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,101 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2021-07-13 19:38:36,101 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,101 INFO L82 PathProgramCache]: Analyzing trace with hash -753314648, now seen corresponding path program 45 times [2021-07-13 19:38:36,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005160736] [2021-07-13 19:38:36,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005160736] [2021-07-13 19:38:36,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005160736] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:36,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796949377] [2021-07-13 19:38:36,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:36,143 INFO L87 Difference]: Start difference. First operand 287 states and 879 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,281 INFO L93 Difference]: Finished difference Result 457 states and 1358 transitions. [2021-07-13 19:38:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,282 INFO L225 Difference]: With dead ends: 457 [2021-07-13 19:38:36,282 INFO L226 Difference]: Without dead ends: 457 [2021-07-13 19:38:36,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-07-13 19:38:36,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 284. [2021-07-13 19:38:36,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 3.07773851590106) internal successors, (871), 283 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 871 transitions. [2021-07-13 19:38:36,287 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 871 transitions. Word has length 18 [2021-07-13 19:38:36,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,287 INFO L482 AbstractCegarLoop]: Abstraction has 284 states and 871 transitions. [2021-07-13 19:38:36,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 871 transitions. [2021-07-13 19:38:36,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,289 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2021-07-13 19:38:36,289 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1623768616, now seen corresponding path program 46 times [2021-07-13 19:38:36,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476440590] [2021-07-13 19:38:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476440590] [2021-07-13 19:38:36,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476440590] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962817252] [2021-07-13 19:38:36,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:36,335 INFO L87 Difference]: Start difference. First operand 284 states and 871 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,491 INFO L93 Difference]: Finished difference Result 519 states and 1486 transitions. [2021-07-13 19:38:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,492 INFO L225 Difference]: With dead ends: 519 [2021-07-13 19:38:36,492 INFO L226 Difference]: Without dead ends: 512 [2021-07-13 19:38:36,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:36,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-07-13 19:38:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 291. [2021-07-13 19:38:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 3.1) internal successors, (899), 290 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 899 transitions. [2021-07-13 19:38:36,499 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 899 transitions. Word has length 18 [2021-07-13 19:38:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,499 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 899 transitions. [2021-07-13 19:38:36,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 899 transitions. [2021-07-13 19:38:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,500 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2021-07-13 19:38:36,500 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,500 INFO L82 PathProgramCache]: Analyzing trace with hash 183330298, now seen corresponding path program 47 times [2021-07-13 19:38:36,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092632811] [2021-07-13 19:38:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092632811] [2021-07-13 19:38:36,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092632811] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:36,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476333363] [2021-07-13 19:38:36,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:36,551 INFO L87 Difference]: Start difference. First operand 291 states and 899 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,707 INFO L93 Difference]: Finished difference Result 528 states and 1521 transitions. [2021-07-13 19:38:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,708 INFO L225 Difference]: With dead ends: 528 [2021-07-13 19:38:36,708 INFO L226 Difference]: Without dead ends: 528 [2021-07-13 19:38:36,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:36,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-07-13 19:38:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 285. [2021-07-13 19:38:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-07-13 19:38:36,717 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-07-13 19:38:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,717 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-07-13 19:38:36,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-07-13 19:38:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,718 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2021-07-13 19:38:36,718 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash 438631872, now seen corresponding path program 48 times [2021-07-13 19:38:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254474061] [2021-07-13 19:38:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254474061] [2021-07-13 19:38:36,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254474061] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:36,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67245019] [2021-07-13 19:38:36,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:36,775 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:36,880 INFO L93 Difference]: Finished difference Result 476 states and 1379 transitions. [2021-07-13 19:38:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:36,881 INFO L225 Difference]: With dead ends: 476 [2021-07-13 19:38:36,881 INFO L226 Difference]: Without dead ends: 469 [2021-07-13 19:38:36,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-07-13 19:38:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 289. [2021-07-13 19:38:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.09375) internal successors, (891), 288 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 891 transitions. [2021-07-13 19:38:36,887 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 891 transitions. Word has length 18 [2021-07-13 19:38:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:36,887 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 891 transitions. [2021-07-13 19:38:36,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:36,887 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 891 transitions. [2021-07-13 19:38:36,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:36,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:36,888 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:36,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2021-07-13 19:38:36,889 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:36,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:36,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1488432600, now seen corresponding path program 49 times [2021-07-13 19:38:36,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:36,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785950186] [2021-07-13 19:38:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:36,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:36,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785950186] [2021-07-13 19:38:36,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785950186] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:36,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:36,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:36,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643802346] [2021-07-13 19:38:36,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:36,936 INFO L87 Difference]: Start difference. First operand 289 states and 891 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,050 INFO L93 Difference]: Finished difference Result 451 states and 1343 transitions. [2021-07-13 19:38:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:37,050 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,051 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:38:37,051 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:38:37,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:37,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:38:37,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 287. [2021-07-13 19:38:37,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 3.097902097902098) internal successors, (886), 286 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 886 transitions. [2021-07-13 19:38:37,057 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 886 transitions. Word has length 18 [2021-07-13 19:38:37,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,057 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 886 transitions. [2021-07-13 19:38:37,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,058 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 886 transitions. [2021-07-13 19:38:37,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:37,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,058 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2021-07-13 19:38:37,060 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash 90944872, now seen corresponding path program 50 times [2021-07-13 19:38:37,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064433223] [2021-07-13 19:38:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064433223] [2021-07-13 19:38:37,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064433223] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:37,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:37,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734580771] [2021-07-13 19:38:37,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:37,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,121 INFO L87 Difference]: Start difference. First operand 287 states and 886 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,286 INFO L93 Difference]: Finished difference Result 511 states and 1492 transitions. [2021-07-13 19:38:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,289 INFO L225 Difference]: With dead ends: 511 [2021-07-13 19:38:37,289 INFO L226 Difference]: Without dead ends: 511 [2021-07-13 19:38:37,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-07-13 19:38:37,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 290. [2021-07-13 19:38:37,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.1176470588235294) internal successors, (901), 289 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 901 transitions. [2021-07-13 19:38:37,299 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 901 transitions. Word has length 18 [2021-07-13 19:38:37,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,299 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 901 transitions. [2021-07-13 19:38:37,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,300 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 901 transitions. [2021-07-13 19:38:37,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:37,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,300 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2021-07-13 19:38:37,301 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1715282640, now seen corresponding path program 51 times [2021-07-13 19:38:37,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305588898] [2021-07-13 19:38:37,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305588898] [2021-07-13 19:38:37,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305588898] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:37,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707413904] [2021-07-13 19:38:37,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,348 INFO L87 Difference]: Start difference. First operand 290 states and 901 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,478 INFO L93 Difference]: Finished difference Result 475 states and 1412 transitions. [2021-07-13 19:38:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,480 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:38:37,480 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:38:37,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:38:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 286. [2021-07-13 19:38:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.087719298245614) internal successors, (880), 285 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 880 transitions. [2021-07-13 19:38:37,485 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 880 transitions. Word has length 18 [2021-07-13 19:38:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,486 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 880 transitions. [2021-07-13 19:38:37,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 880 transitions. [2021-07-13 19:38:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:37,486 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,486 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2021-07-13 19:38:37,486 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 677704442, now seen corresponding path program 52 times [2021-07-13 19:38:37,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471270704] [2021-07-13 19:38:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471270704] [2021-07-13 19:38:37,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471270704] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:37,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:37,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145891535] [2021-07-13 19:38:37,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:37,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:37,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,532 INFO L87 Difference]: Start difference. First operand 286 states and 880 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,666 INFO L93 Difference]: Finished difference Result 553 states and 1642 transitions. [2021-07-13 19:38:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,672 INFO L225 Difference]: With dead ends: 553 [2021-07-13 19:38:37,672 INFO L226 Difference]: Without dead ends: 553 [2021-07-13 19:38:37,672 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-07-13 19:38:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 289. [2021-07-13 19:38:37,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.0972222222222223) internal successors, (892), 288 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 892 transitions. [2021-07-13 19:38:37,676 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 892 transitions. Word has length 18 [2021-07-13 19:38:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,676 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 892 transitions. [2021-07-13 19:38:37,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 892 transitions. [2021-07-13 19:38:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:37,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,677 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-07-13 19:38:37,677 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1850997812, now seen corresponding path program 53 times [2021-07-13 19:38:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912666407] [2021-07-13 19:38:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912666407] [2021-07-13 19:38:37,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912666407] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:37,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:37,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478729650] [2021-07-13 19:38:37,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:37,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:37,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,720 INFO L87 Difference]: Start difference. First operand 289 states and 892 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:37,857 INFO L93 Difference]: Finished difference Result 531 states and 1576 transitions. [2021-07-13 19:38:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:37,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:37,858 INFO L225 Difference]: With dead ends: 531 [2021-07-13 19:38:37,859 INFO L226 Difference]: Without dead ends: 531 [2021-07-13 19:38:37,859 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-07-13 19:38:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 292. [2021-07-13 19:38:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1168384879725086) internal successors, (907), 291 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 907 transitions. [2021-07-13 19:38:37,863 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 907 transitions. Word has length 18 [2021-07-13 19:38:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:37,863 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 907 transitions. [2021-07-13 19:38:37,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:37,863 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 907 transitions. [2021-07-13 19:38:37,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:37,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:37,864 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:37,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2021-07-13 19:38:37,864 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:37,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash -819631716, now seen corresponding path program 54 times [2021-07-13 19:38:37,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:37,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954828081] [2021-07-13 19:38:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:37,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:37,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954828081] [2021-07-13 19:38:37,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954828081] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:37,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:37,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:37,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659396599] [2021-07-13 19:38:37,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:37,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:37,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:37,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:37,912 INFO L87 Difference]: Start difference. First operand 292 states and 907 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,038 INFO L93 Difference]: Finished difference Result 489 states and 1481 transitions. [2021-07-13 19:38:38,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,039 INFO L225 Difference]: With dead ends: 489 [2021-07-13 19:38:38,039 INFO L226 Difference]: Without dead ends: 489 [2021-07-13 19:38:38,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-07-13 19:38:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 285. [2021-07-13 19:38:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0809859154929575) internal successors, (875), 284 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 875 transitions. [2021-07-13 19:38:38,043 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 875 transitions. Word has length 18 [2021-07-13 19:38:38,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,043 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 875 transitions. [2021-07-13 19:38:38,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,043 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 875 transitions. [2021-07-13 19:38:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,044 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2021-07-13 19:38:38,044 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash 775146144, now seen corresponding path program 55 times [2021-07-13 19:38:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671731335] [2021-07-13 19:38:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671731335] [2021-07-13 19:38:38,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671731335] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:38,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:38,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:38,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909703373] [2021-07-13 19:38:38,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:38,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:38,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:38,088 INFO L87 Difference]: Start difference. First operand 285 states and 875 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,199 INFO L93 Difference]: Finished difference Result 471 states and 1374 transitions. [2021-07-13 19:38:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,201 INFO L225 Difference]: With dead ends: 471 [2021-07-13 19:38:38,201 INFO L226 Difference]: Without dead ends: 464 [2021-07-13 19:38:38,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-13 19:38:38,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 294. [2021-07-13 19:38:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 3.1296928327645053) internal successors, (917), 293 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 917 transitions. [2021-07-13 19:38:38,207 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 917 transitions. Word has length 18 [2021-07-13 19:38:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,207 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 917 transitions. [2021-07-13 19:38:38,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 917 transitions. [2021-07-13 19:38:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,208 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2021-07-13 19:38:38,208 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2025408914, now seen corresponding path program 45 times [2021-07-13 19:38:38,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519087443] [2021-07-13 19:38:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519087443] [2021-07-13 19:38:38,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519087443] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:38,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:38,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:38,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782149651] [2021-07-13 19:38:38,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:38,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:38,260 INFO L87 Difference]: Start difference. First operand 294 states and 917 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,372 INFO L93 Difference]: Finished difference Result 540 states and 1577 transitions. [2021-07-13 19:38:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,373 INFO L225 Difference]: With dead ends: 540 [2021-07-13 19:38:38,373 INFO L226 Difference]: Without dead ends: 540 [2021-07-13 19:38:38,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-07-13 19:38:38,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 299. [2021-07-13 19:38:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.161073825503356) internal successors, (942), 298 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 942 transitions. [2021-07-13 19:38:38,377 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 942 transitions. Word has length 18 [2021-07-13 19:38:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,377 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 942 transitions. [2021-07-13 19:38:38,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,378 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 942 transitions. [2021-07-13 19:38:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,378 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2021-07-13 19:38:38,378 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash 775650660, now seen corresponding path program 46 times [2021-07-13 19:38:38,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829274532] [2021-07-13 19:38:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829274532] [2021-07-13 19:38:38,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829274532] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:38,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:38,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:38,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780383137] [2021-07-13 19:38:38,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:38,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:38,425 INFO L87 Difference]: Start difference. First operand 299 states and 942 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,568 INFO L93 Difference]: Finished difference Result 539 states and 1563 transitions. [2021-07-13 19:38:38,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,570 INFO L225 Difference]: With dead ends: 539 [2021-07-13 19:38:38,570 INFO L226 Difference]: Without dead ends: 533 [2021-07-13 19:38:38,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-07-13 19:38:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 305. [2021-07-13 19:38:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1315789473684212) internal successors, (952), 304 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 952 transitions. [2021-07-13 19:38:38,577 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 952 transitions. Word has length 18 [2021-07-13 19:38:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,577 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 952 transitions. [2021-07-13 19:38:38,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 952 transitions. [2021-07-13 19:38:38,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,578 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,578 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2021-07-13 19:38:38,578 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,578 INFO L82 PathProgramCache]: Analyzing trace with hash -665292174, now seen corresponding path program 56 times [2021-07-13 19:38:38,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43939827] [2021-07-13 19:38:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43939827] [2021-07-13 19:38:38,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43939827] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:38,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:38,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364126863] [2021-07-13 19:38:38,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:38,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:38,625 INFO L87 Difference]: Start difference. First operand 305 states and 952 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,753 INFO L93 Difference]: Finished difference Result 491 states and 1444 transitions. [2021-07-13 19:38:38,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,755 INFO L225 Difference]: With dead ends: 491 [2021-07-13 19:38:38,755 INFO L226 Difference]: Without dead ends: 491 [2021-07-13 19:38:38,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-07-13 19:38:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 299. [2021-07-13 19:38:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-07-13 19:38:38,760 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-07-13 19:38:38,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,761 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-07-13 19:38:38,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-07-13 19:38:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,761 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,761 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2021-07-13 19:38:38,761 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,761 INFO L82 PathProgramCache]: Analyzing trace with hash -409990600, now seen corresponding path program 57 times [2021-07-13 19:38:38,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142243945] [2021-07-13 19:38:38,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142243945] [2021-07-13 19:38:38,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142243945] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:38,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:38,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:38,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106302295] [2021-07-13 19:38:38,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:38,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:38,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:38,814 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:38,949 INFO L93 Difference]: Finished difference Result 517 states and 1486 transitions. [2021-07-13 19:38:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:38,950 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:38:38,950 INFO L226 Difference]: Without dead ends: 510 [2021-07-13 19:38:38,951 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-07-13 19:38:38,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 303. [2021-07-13 19:38:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-07-13 19:38:38,955 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-07-13 19:38:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:38,955 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-07-13 19:38:38,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-07-13 19:38:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:38,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:38,956 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:38,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2021-07-13 19:38:38,956 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1957912224, now seen corresponding path program 58 times [2021-07-13 19:38:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:38,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362793004] [2021-07-13 19:38:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:38,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:38,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362793004] [2021-07-13 19:38:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362793004] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:39,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:39,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:39,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753215504] [2021-07-13 19:38:39,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:39,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:39,000 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:39,140 INFO L93 Difference]: Finished difference Result 492 states and 1450 transitions. [2021-07-13 19:38:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:39,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:39,141 INFO L225 Difference]: With dead ends: 492 [2021-07-13 19:38:39,141 INFO L226 Difference]: Without dead ends: 492 [2021-07-13 19:38:39,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-13 19:38:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 299. [2021-07-13 19:38:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-07-13 19:38:39,146 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-07-13 19:38:39,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:39,146 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-07-13 19:38:39,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,146 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-07-13 19:38:39,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:39,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:39,146 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:39,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2021-07-13 19:38:39,146 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1274008476, now seen corresponding path program 47 times [2021-07-13 19:38:39,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:39,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313121022] [2021-07-13 19:38:39,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:39,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313121022] [2021-07-13 19:38:39,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313121022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427815236] [2021-07-13 19:38:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:39,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:39,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427815236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:39,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:39,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879562388] [2021-07-13 19:38:39,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:39,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:39,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:39,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:39,346 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:39,614 INFO L93 Difference]: Finished difference Result 604 states and 1726 transitions. [2021-07-13 19:38:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:39,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:39,615 INFO L225 Difference]: With dead ends: 604 [2021-07-13 19:38:39,615 INFO L226 Difference]: Without dead ends: 604 [2021-07-13 19:38:39,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:38:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-07-13 19:38:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 302. [2021-07-13 19:38:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.13953488372093) internal successors, (945), 301 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 945 transitions. [2021-07-13 19:38:39,620 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 945 transitions. Word has length 18 [2021-07-13 19:38:39,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:39,620 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 945 transitions. [2021-07-13 19:38:39,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 945 transitions. [2021-07-13 19:38:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:39,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:39,621 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:39,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,822 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash 18333924, now seen corresponding path program 48 times [2021-07-13 19:38:39,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:39,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494426218] [2021-07-13 19:38:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:39,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494426218] [2021-07-13 19:38:39,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494426218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:39,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791196489] [2021-07-13 19:38:39,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:39,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791196489] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:40,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:40,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:40,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041507490] [2021-07-13 19:38:40,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:40,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:40,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:40,001 INFO L87 Difference]: Start difference. First operand 302 states and 945 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,164 INFO L93 Difference]: Finished difference Result 560 states and 1629 transitions. [2021-07-13 19:38:40,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:40,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,165 INFO L225 Difference]: With dead ends: 560 [2021-07-13 19:38:40,165 INFO L226 Difference]: Without dead ends: 560 [2021-07-13 19:38:40,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-13 19:38:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 299. [2021-07-13 19:38:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.120805369127517) internal successors, (930), 298 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 930 transitions. [2021-07-13 19:38:40,171 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 930 transitions. Word has length 18 [2021-07-13 19:38:40,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,171 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 930 transitions. [2021-07-13 19:38:40,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 930 transitions. [2021-07-13 19:38:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:40,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:40,394 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1253271948, now seen corresponding path program 49 times [2021-07-13 19:38:40,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245706019] [2021-07-13 19:38:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245706019] [2021-07-13 19:38:40,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245706019] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:40,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:40,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658069319] [2021-07-13 19:38:40,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:40,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:40,440 INFO L87 Difference]: Start difference. First operand 299 states and 930 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,547 INFO L93 Difference]: Finished difference Result 578 states and 1648 transitions. [2021-07-13 19:38:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,548 INFO L225 Difference]: With dead ends: 578 [2021-07-13 19:38:40,548 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:38:40,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:38:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 303. [2021-07-13 19:38:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.1258278145695364) internal successors, (944), 302 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 944 transitions. [2021-07-13 19:38:40,553 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 944 transitions. Word has length 18 [2021-07-13 19:38:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 944 transitions. [2021-07-13 19:38:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 944 transitions. [2021-07-13 19:38:40,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:40,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,553 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2021-07-13 19:38:40,554 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1126271422, now seen corresponding path program 50 times [2021-07-13 19:38:40,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844269380] [2021-07-13 19:38:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844269380] [2021-07-13 19:38:40,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844269380] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:40,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:40,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:40,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010760542] [2021-07-13 19:38:40,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:40,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:40,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:40,611 INFO L87 Difference]: Start difference. First operand 303 states and 944 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,741 INFO L93 Difference]: Finished difference Result 436 states and 1296 transitions. [2021-07-13 19:38:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,742 INFO L225 Difference]: With dead ends: 436 [2021-07-13 19:38:40,742 INFO L226 Difference]: Without dead ends: 436 [2021-07-13 19:38:40,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-07-13 19:38:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 301. [2021-07-13 19:38:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.13) internal successors, (939), 300 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 939 transitions. [2021-07-13 19:38:40,748 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 939 transitions. Word has length 18 [2021-07-13 19:38:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,748 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 939 transitions. [2021-07-13 19:38:40,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 939 transitions. [2021-07-13 19:38:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:40,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,749 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2021-07-13 19:38:40,749 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash -757677600, now seen corresponding path program 59 times [2021-07-13 19:38:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141944512] [2021-07-13 19:38:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141944512] [2021-07-13 19:38:40,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141944512] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:40,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:40,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:40,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038052828] [2021-07-13 19:38:40,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:40,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:40,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:40,794 INFO L87 Difference]: Start difference. First operand 301 states and 939 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:40,909 INFO L93 Difference]: Finished difference Result 565 states and 1643 transitions. [2021-07-13 19:38:40,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:40,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:40,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:40,910 INFO L225 Difference]: With dead ends: 565 [2021-07-13 19:38:40,910 INFO L226 Difference]: Without dead ends: 565 [2021-07-13 19:38:40,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-07-13 19:38:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 304. [2021-07-13 19:38:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 3.1485148514851486) internal successors, (954), 303 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 954 transitions. [2021-07-13 19:38:40,914 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 954 transitions. Word has length 18 [2021-07-13 19:38:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:40,915 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 954 transitions. [2021-07-13 19:38:40,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 954 transitions. [2021-07-13 19:38:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:40,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:40,915 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:40,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2021-07-13 19:38:40,915 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:40,915 INFO L82 PathProgramCache]: Analyzing trace with hash 866660168, now seen corresponding path program 60 times [2021-07-13 19:38:40,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:40,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587368808] [2021-07-13 19:38:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:40,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:40,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587368808] [2021-07-13 19:38:40,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587368808] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:40,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:40,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:40,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738793861] [2021-07-13 19:38:40,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:40,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:40,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:40,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:40,956 INFO L87 Difference]: Start difference. First operand 304 states and 954 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,087 INFO L93 Difference]: Finished difference Result 526 states and 1553 transitions. [2021-07-13 19:38:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,088 INFO L225 Difference]: With dead ends: 526 [2021-07-13 19:38:41,088 INFO L226 Difference]: Without dead ends: 526 [2021-07-13 19:38:41,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-07-13 19:38:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 299. [2021-07-13 19:38:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.110738255033557) internal successors, (927), 298 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 927 transitions. [2021-07-13 19:38:41,093 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 927 transitions. Word has length 18 [2021-07-13 19:38:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,093 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 927 transitions. [2021-07-13 19:38:41,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 927 transitions. [2021-07-13 19:38:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:41,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,093 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2021-07-13 19:38:41,093 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1772548066, now seen corresponding path program 61 times [2021-07-13 19:38:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578455914] [2021-07-13 19:38:41,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578455914] [2021-07-13 19:38:41,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578455914] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:41,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:41,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:41,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979669861] [2021-07-13 19:38:41,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:41,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:41,133 INFO L87 Difference]: Start difference. First operand 299 states and 927 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,251 INFO L93 Difference]: Finished difference Result 429 states and 1270 transitions. [2021-07-13 19:38:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:41,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,252 INFO L225 Difference]: With dead ends: 429 [2021-07-13 19:38:41,252 INFO L226 Difference]: Without dead ends: 422 [2021-07-13 19:38:41,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:41,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-07-13 19:38:41,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 305. [2021-07-13 19:38:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 3.1184210526315788) internal successors, (948), 304 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 948 transitions. [2021-07-13 19:38:41,256 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 948 transitions. Word has length 18 [2021-07-13 19:38:41,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,256 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 948 transitions. [2021-07-13 19:38:41,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,256 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 948 transitions. [2021-07-13 19:38:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:41,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,257 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2021-07-13 19:38:41,257 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,257 INFO L82 PathProgramCache]: Analyzing trace with hash -154516406, now seen corresponding path program 62 times [2021-07-13 19:38:41,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952251387] [2021-07-13 19:38:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952251387] [2021-07-13 19:38:41,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952251387] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:41,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:41,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:41,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908294002] [2021-07-13 19:38:41,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:41,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:41,304 INFO L87 Difference]: Start difference. First operand 305 states and 948 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,435 INFO L93 Difference]: Finished difference Result 428 states and 1275 transitions. [2021-07-13 19:38:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:41,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,436 INFO L225 Difference]: With dead ends: 428 [2021-07-13 19:38:41,436 INFO L226 Difference]: Without dead ends: 428 [2021-07-13 19:38:41,436 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-07-13 19:38:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 301. [2021-07-13 19:38:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 3.1133333333333333) internal successors, (934), 300 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 934 transitions. [2021-07-13 19:38:41,440 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 934 transitions. Word has length 18 [2021-07-13 19:38:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,440 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 934 transitions. [2021-07-13 19:38:41,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 934 transitions. [2021-07-13 19:38:41,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:41,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,440 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2021-07-13 19:38:41,440 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1618310896, now seen corresponding path program 63 times [2021-07-13 19:38:41,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49561261] [2021-07-13 19:38:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49561261] [2021-07-13 19:38:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49561261] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:41,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600998807] [2021-07-13 19:38:41,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:41,476 INFO L87 Difference]: Start difference. First operand 301 states and 934 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,601 INFO L93 Difference]: Finished difference Result 444 states and 1322 transitions. [2021-07-13 19:38:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:41,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:41,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,602 INFO L225 Difference]: With dead ends: 444 [2021-07-13 19:38:41,602 INFO L226 Difference]: Without dead ends: 444 [2021-07-13 19:38:41,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-07-13 19:38:41,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 299. [2021-07-13 19:38:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 3.11744966442953) internal successors, (929), 298 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 929 transitions. [2021-07-13 19:38:41,606 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 929 transitions. Word has length 18 [2021-07-13 19:38:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,606 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 929 transitions. [2021-07-13 19:38:41,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,606 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 929 transitions. [2021-07-13 19:38:41,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:41,607 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,607 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:41,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2021-07-13 19:38:41,607 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash 486044464, now seen corresponding path program 51 times [2021-07-13 19:38:41,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:41,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267247564] [2021-07-13 19:38:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267247564] [2021-07-13 19:38:41,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267247564] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:41,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122310688] [2021-07-13 19:38:41,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:41,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:41,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:41,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122310688] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:41,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:41,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2021-07-13 19:38:41,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624996118] [2021-07-13 19:38:41,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:41,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:41,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:41,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:41,787 INFO L87 Difference]: Start difference. First operand 299 states and 929 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:41,918 INFO L93 Difference]: Finished difference Result 518 states and 1517 transitions. [2021-07-13 19:38:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:41,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:41,919 INFO L225 Difference]: With dead ends: 518 [2021-07-13 19:38:41,919 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:38:41,919 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:38:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 300. [2021-07-13 19:38:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.1137123745819397) internal successors, (931), 299 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 931 transitions. [2021-07-13 19:38:41,923 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 931 transitions. Word has length 18 [2021-07-13 19:38:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:41,923 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 931 transitions. [2021-07-13 19:38:41,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 931 transitions. [2021-07-13 19:38:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:41,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:41,924 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:42,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,124 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1778386864, now seen corresponding path program 52 times [2021-07-13 19:38:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:42,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204860067] [2021-07-13 19:38:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204860067] [2021-07-13 19:38:42,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204860067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051420652] [2021-07-13 19:38:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:42,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:42,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051420652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:42,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:38:42,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171440442] [2021-07-13 19:38:42,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:38:42,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:38:42,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:42,300 INFO L87 Difference]: Start difference. First operand 300 states and 931 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:42,495 INFO L93 Difference]: Finished difference Result 506 states and 1484 transitions. [2021-07-13 19:38:42,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:42,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:42,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:42,497 INFO L225 Difference]: With dead ends: 506 [2021-07-13 19:38:42,497 INFO L226 Difference]: Without dead ends: 506 [2021-07-13 19:38:42,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-07-13 19:38:42,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 289. [2021-07-13 19:38:42,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-07-13 19:38:42,501 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-07-13 19:38:42,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:42,501 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-07-13 19:38:42,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-07-13 19:38:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:42,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:42,501 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:42,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-07-13 19:38:42,702 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1819059010, now seen corresponding path program 53 times [2021-07-13 19:38:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:42,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916150365] [2021-07-13 19:38:42,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:42,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:42,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916150365] [2021-07-13 19:38:42,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916150365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91305907] [2021-07-13 19:38:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:42,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:42,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:38:42,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:42,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91305907] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:42,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:38:42,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 10 [2021-07-13 19:38:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81082951] [2021-07-13 19:38:42,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:42,858 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,003 INFO L93 Difference]: Finished difference Result 496 states and 1443 transitions. [2021-07-13 19:38:43,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:43,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:43,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,004 INFO L225 Difference]: With dead ends: 496 [2021-07-13 19:38:43,004 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:38:43,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:38:43,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:38:43,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 286. [2021-07-13 19:38:43,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-07-13 19:38:43,008 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-07-13 19:38:43,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,008 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-07-13 19:38:43,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,008 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-07-13 19:38:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:43,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,009 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 19:38:43,209 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash -760676186, now seen corresponding path program 54 times [2021-07-13 19:38:43,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977457703] [2021-07-13 19:38:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977457703] [2021-07-13 19:38:43,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977457703] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:43,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:43,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:43,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526935668] [2021-07-13 19:38:43,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:43,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:43,244 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,339 INFO L93 Difference]: Finished difference Result 544 states and 1547 transitions. [2021-07-13 19:38:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:43,339 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,340 INFO L225 Difference]: With dead ends: 544 [2021-07-13 19:38:43,340 INFO L226 Difference]: Without dead ends: 538 [2021-07-13 19:38:43,340 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-07-13 19:38:43,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 300. [2021-07-13 19:38:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 3.080267558528428) internal successors, (921), 299 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 921 transitions. [2021-07-13 19:38:43,345 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 921 transitions. Word has length 18 [2021-07-13 19:38:43,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,345 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 921 transitions. [2021-07-13 19:38:43,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,345 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 921 transitions. [2021-07-13 19:38:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:43,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,345 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2021-07-13 19:38:43,345 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1618867184, now seen corresponding path program 55 times [2021-07-13 19:38:43,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833120313] [2021-07-13 19:38:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833120313] [2021-07-13 19:38:43,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833120313] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:43,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:43,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:43,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766102964] [2021-07-13 19:38:43,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:43,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:43,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:43,399 INFO L87 Difference]: Start difference. First operand 300 states and 921 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,534 INFO L93 Difference]: Finished difference Result 465 states and 1345 transitions. [2021-07-13 19:38:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,536 INFO L225 Difference]: With dead ends: 465 [2021-07-13 19:38:43,536 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:38:43,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:38:43,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:38:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 298. [2021-07-13 19:38:43,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0841750841750843) internal successors, (916), 297 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 916 transitions. [2021-07-13 19:38:43,540 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 916 transitions. Word has length 18 [2021-07-13 19:38:43,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,540 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 916 transitions. [2021-07-13 19:38:43,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 916 transitions. [2021-07-13 19:38:43,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:43,543 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,543 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2021-07-13 19:38:43,543 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 290169764, now seen corresponding path program 56 times [2021-07-13 19:38:43,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40895410] [2021-07-13 19:38:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40895410] [2021-07-13 19:38:43,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40895410] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:43,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:43,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:43,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242032117] [2021-07-13 19:38:43,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:43,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:43,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:43,585 INFO L87 Difference]: Start difference. First operand 298 states and 916 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,706 INFO L93 Difference]: Finished difference Result 486 states and 1387 transitions. [2021-07-13 19:38:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:38:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,707 INFO L225 Difference]: With dead ends: 486 [2021-07-13 19:38:43,707 INFO L226 Difference]: Without dead ends: 486 [2021-07-13 19:38:43,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-07-13 19:38:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 286. [2021-07-13 19:38:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 3.094736842105263) internal successors, (882), 285 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 882 transitions. [2021-07-13 19:38:43,712 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 882 transitions. Word has length 18 [2021-07-13 19:38:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,712 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 882 transitions. [2021-07-13 19:38:43,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,712 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 882 transitions. [2021-07-13 19:38:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:43,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,712 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2021-07-13 19:38:43,712 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash -687567564, now seen corresponding path program 64 times [2021-07-13 19:38:43,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618793793] [2021-07-13 19:38:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618793793] [2021-07-13 19:38:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618793793] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:43,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:43,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:43,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761717375] [2021-07-13 19:38:43,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:43,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:43,766 INFO L87 Difference]: Start difference. First operand 286 states and 882 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:43,919 INFO L93 Difference]: Finished difference Result 514 states and 1519 transitions. [2021-07-13 19:38:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:43,921 INFO L225 Difference]: With dead ends: 514 [2021-07-13 19:38:43,921 INFO L226 Difference]: Without dead ends: 514 [2021-07-13 19:38:43,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-07-13 19:38:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 292. [2021-07-13 19:38:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 3.1237113402061856) internal successors, (909), 291 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 909 transitions. [2021-07-13 19:38:43,926 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 909 transitions. Word has length 18 [2021-07-13 19:38:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:43,927 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 909 transitions. [2021-07-13 19:38:43,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 909 transitions. [2021-07-13 19:38:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:43,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:43,927 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:43,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2021-07-13 19:38:43,928 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 936770204, now seen corresponding path program 65 times [2021-07-13 19:38:43,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:43,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806268988] [2021-07-13 19:38:43,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:43,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:43,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806268988] [2021-07-13 19:38:43,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806268988] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:43,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:43,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:43,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683490849] [2021-07-13 19:38:43,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:43,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:43,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:43,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:43,973 INFO L87 Difference]: Start difference. First operand 292 states and 909 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,101 INFO L93 Difference]: Finished difference Result 517 states and 1525 transitions. [2021-07-13 19:38:44,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,103 INFO L225 Difference]: With dead ends: 517 [2021-07-13 19:38:44,103 INFO L226 Difference]: Without dead ends: 517 [2021-07-13 19:38:44,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-07-13 19:38:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 289. [2021-07-13 19:38:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 3.1041666666666665) internal successors, (894), 288 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 894 transitions. [2021-07-13 19:38:44,107 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 894 transitions. Word has length 18 [2021-07-13 19:38:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,107 INFO L482 AbstractCegarLoop]: Abstraction has 289 states and 894 transitions. [2021-07-13 19:38:44,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 894 transitions. [2021-07-13 19:38:44,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,107 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2021-07-13 19:38:44,108 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1977006002, now seen corresponding path program 66 times [2021-07-13 19:38:44,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149936865] [2021-07-13 19:38:44,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149936865] [2021-07-13 19:38:44,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149936865] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579304174] [2021-07-13 19:38:44,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,149 INFO L87 Difference]: Start difference. First operand 289 states and 894 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,260 INFO L93 Difference]: Finished difference Result 508 states and 1493 transitions. [2021-07-13 19:38:44,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,261 INFO L225 Difference]: With dead ends: 508 [2021-07-13 19:38:44,262 INFO L226 Difference]: Without dead ends: 508 [2021-07-13 19:38:44,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:38:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-07-13 19:38:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 285. [2021-07-13 19:38:44,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.0880281690140845) internal successors, (877), 284 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 877 transitions. [2021-07-13 19:38:44,266 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 877 transitions. Word has length 18 [2021-07-13 19:38:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,266 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 877 transitions. [2021-07-13 19:38:44,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 877 transitions. [2021-07-13 19:38:44,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2021-07-13 19:38:44,266 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1821454276, now seen corresponding path program 57 times [2021-07-13 19:38:44,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590713826] [2021-07-13 19:38:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590713826] [2021-07-13 19:38:44,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590713826] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013837650] [2021-07-13 19:38:44,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,310 INFO L87 Difference]: Start difference. First operand 285 states and 877 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,397 INFO L93 Difference]: Finished difference Result 435 states and 1231 transitions. [2021-07-13 19:38:44,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,398 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,398 INFO L225 Difference]: With dead ends: 435 [2021-07-13 19:38:44,399 INFO L226 Difference]: Without dead ends: 429 [2021-07-13 19:38:44,399 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:44,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-07-13 19:38:44,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 297. [2021-07-13 19:38:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.0777027027027026) internal successors, (911), 296 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 911 transitions. [2021-07-13 19:38:44,404 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 911 transitions. Word has length 18 [2021-07-13 19:38:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,404 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 911 transitions. [2021-07-13 19:38:44,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,405 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 911 transitions. [2021-07-13 19:38:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,405 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2021-07-13 19:38:44,406 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 558089094, now seen corresponding path program 58 times [2021-07-13 19:38:44,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067925226] [2021-07-13 19:38:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067925226] [2021-07-13 19:38:44,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067925226] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099804813] [2021-07-13 19:38:44,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,453 INFO L87 Difference]: Start difference. First operand 297 states and 911 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,557 INFO L93 Difference]: Finished difference Result 379 states and 1118 transitions. [2021-07-13 19:38:44,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,558 INFO L225 Difference]: With dead ends: 379 [2021-07-13 19:38:44,558 INFO L226 Difference]: Without dead ends: 379 [2021-07-13 19:38:44,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-07-13 19:38:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 295. [2021-07-13 19:38:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0816326530612246) internal successors, (906), 294 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 906 transitions. [2021-07-13 19:38:44,563 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 906 transitions. Word has length 18 [2021-07-13 19:38:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,563 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 906 transitions. [2021-07-13 19:38:44,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 906 transitions. [2021-07-13 19:38:44,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,564 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2021-07-13 19:38:44,564 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,564 INFO L82 PathProgramCache]: Analyzing trace with hash -770608326, now seen corresponding path program 59 times [2021-07-13 19:38:44,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578097330] [2021-07-13 19:38:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578097330] [2021-07-13 19:38:44,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578097330] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77585433] [2021-07-13 19:38:44,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,598 INFO L87 Difference]: Start difference. First operand 295 states and 906 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,686 INFO L93 Difference]: Finished difference Result 404 states and 1172 transitions. [2021-07-13 19:38:44,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,687 INFO L225 Difference]: With dead ends: 404 [2021-07-13 19:38:44,687 INFO L226 Difference]: Without dead ends: 404 [2021-07-13 19:38:44,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-07-13 19:38:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2021-07-13 19:38:44,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 3.0921985815602837) internal successors, (872), 282 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 872 transitions. [2021-07-13 19:38:44,692 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 872 transitions. Word has length 18 [2021-07-13 19:38:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,692 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 872 transitions. [2021-07-13 19:38:44,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 872 transitions. [2021-07-13 19:38:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,692 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2021-07-13 19:38:44,693 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1443851738, now seen corresponding path program 67 times [2021-07-13 19:38:44,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28298723] [2021-07-13 19:38:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28298723] [2021-07-13 19:38:44,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28298723] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173735003] [2021-07-13 19:38:44,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,729 INFO L87 Difference]: Start difference. First operand 283 states and 872 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,825 INFO L93 Difference]: Finished difference Result 443 states and 1306 transitions. [2021-07-13 19:38:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,825 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,826 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:38:44,826 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:38:44,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:38:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 282. [2021-07-13 19:38:44,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 3.088967971530249) internal successors, (868), 281 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 868 transitions. [2021-07-13 19:38:44,829 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 868 transitions. Word has length 18 [2021-07-13 19:38:44,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,830 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 868 transitions. [2021-07-13 19:38:44,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,830 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 868 transitions. [2021-07-13 19:38:44,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,830 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2021-07-13 19:38:44,830 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash -270558368, now seen corresponding path program 68 times [2021-07-13 19:38:44,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833821254] [2021-07-13 19:38:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:44,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:44,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833821254] [2021-07-13 19:38:44,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833821254] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:44,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:44,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:44,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703038649] [2021-07-13 19:38:44,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:44,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:44,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:44,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:44,867 INFO L87 Difference]: Start difference. First operand 282 states and 868 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:44,972 INFO L93 Difference]: Finished difference Result 485 states and 1413 transitions. [2021-07-13 19:38:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:44,973 INFO L225 Difference]: With dead ends: 485 [2021-07-13 19:38:44,973 INFO L226 Difference]: Without dead ends: 485 [2021-07-13 19:38:44,973 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-07-13 19:38:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 285. [2021-07-13 19:38:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 3.109154929577465) internal successors, (883), 284 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 883 transitions. [2021-07-13 19:38:44,977 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 883 transitions. Word has length 18 [2021-07-13 19:38:44,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:44,977 INFO L482 AbstractCegarLoop]: Abstraction has 285 states and 883 transitions. [2021-07-13 19:38:44,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:44,978 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 883 transitions. [2021-07-13 19:38:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:44,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:44,978 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:44,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2021-07-13 19:38:44,978 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:44,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1353779400, now seen corresponding path program 69 times [2021-07-13 19:38:44,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:44,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671485889] [2021-07-13 19:38:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671485889] [2021-07-13 19:38:45,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671485889] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:45,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:45,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240004039] [2021-07-13 19:38:45,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:45,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:45,024 INFO L87 Difference]: Start difference. First operand 285 states and 883 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,132 INFO L93 Difference]: Finished difference Result 443 states and 1318 transitions. [2021-07-13 19:38:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:45,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:45,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,133 INFO L225 Difference]: With dead ends: 443 [2021-07-13 19:38:45,133 INFO L226 Difference]: Without dead ends: 443 [2021-07-13 19:38:45,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:45,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-07-13 19:38:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 279. [2021-07-13 19:38:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 3.079136690647482) internal successors, (856), 278 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 856 transitions. [2021-07-13 19:38:45,139 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 856 transitions. Word has length 18 [2021-07-13 19:38:45,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,139 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 856 transitions. [2021-07-13 19:38:45,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 856 transitions. [2021-07-13 19:38:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:45,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,139 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2021-07-13 19:38:45,140 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1960501272, now seen corresponding path program 70 times [2021-07-13 19:38:45,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95868161] [2021-07-13 19:38:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95868161] [2021-07-13 19:38:45,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95868161] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:45,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:45,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:45,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833096790] [2021-07-13 19:38:45,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:45,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:45,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:45,179 INFO L87 Difference]: Start difference. First operand 279 states and 856 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,292 INFO L93 Difference]: Finished difference Result 463 states and 1339 transitions. [2021-07-13 19:38:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,293 INFO L225 Difference]: With dead ends: 463 [2021-07-13 19:38:45,293 INFO L226 Difference]: Without dead ends: 463 [2021-07-13 19:38:45,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-07-13 19:38:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 280. [2021-07-13 19:38:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 3.075268817204301) internal successors, (858), 279 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 858 transitions. [2021-07-13 19:38:45,297 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 858 transitions. Word has length 18 [2021-07-13 19:38:45,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,297 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 858 transitions. [2021-07-13 19:38:45,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,298 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 858 transitions. [2021-07-13 19:38:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:45,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,298 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2021-07-13 19:38:45,298 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,298 INFO L82 PathProgramCache]: Analyzing trace with hash -336163504, now seen corresponding path program 71 times [2021-07-13 19:38:45,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526213678] [2021-07-13 19:38:45,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526213678] [2021-07-13 19:38:45,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526213678] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:45,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:45,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:45,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031007608] [2021-07-13 19:38:45,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:45,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:45,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:45,333 INFO L87 Difference]: Start difference. First operand 280 states and 858 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,440 INFO L93 Difference]: Finished difference Result 466 states and 1345 transitions. [2021-07-13 19:38:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:45,440 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,441 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:38:45,441 INFO L226 Difference]: Without dead ends: 466 [2021-07-13 19:38:45,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-07-13 19:38:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 277. [2021-07-13 19:38:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 3.0543478260869565) internal successors, (843), 276 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 843 transitions. [2021-07-13 19:38:45,445 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 843 transitions. Word has length 18 [2021-07-13 19:38:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,445 INFO L482 AbstractCegarLoop]: Abstraction has 277 states and 843 transitions. [2021-07-13 19:38:45,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 843 transitions. [2021-07-13 19:38:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:38:45,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,445 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2021-07-13 19:38:45,445 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash 704072294, now seen corresponding path program 72 times [2021-07-13 19:38:45,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008034345] [2021-07-13 19:38:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:45,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008034345] [2021-07-13 19:38:45,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008034345] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:38:45,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:38:45,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:38:45,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876866551] [2021-07-13 19:38:45,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:38:45,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:38:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:38:45,475 INFO L87 Difference]: Start difference. First operand 277 states and 843 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,570 INFO L93 Difference]: Finished difference Result 415 states and 1214 transitions. [2021-07-13 19:38:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:38:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:38:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,571 INFO L225 Difference]: With dead ends: 415 [2021-07-13 19:38:45,571 INFO L226 Difference]: Without dead ends: 415 [2021-07-13 19:38:45,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:38:45,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-07-13 19:38:45,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 263. [2021-07-13 19:38:45,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 3.053435114503817) internal successors, (800), 262 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 800 transitions. [2021-07-13 19:38:45,575 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 800 transitions. Word has length 18 [2021-07-13 19:38:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,575 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 800 transitions. [2021-07-13 19:38:45,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 800 transitions. [2021-07-13 19:38:45,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:45,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,575 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:45,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2021-07-13 19:38:45,575 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:45,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:45,576 INFO L82 PathProgramCache]: Analyzing trace with hash 991123733, now seen corresponding path program 1 times [2021-07-13 19:38:45,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061514737] [2021-07-13 19:38:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:45,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:45,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061514737] [2021-07-13 19:38:45,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061514737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113084595] [2021-07-13 19:38:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:38:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:38:45,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113084595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:45,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:45,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:38:45,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232614009] [2021-07-13 19:38:45,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:38:45,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:45,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:38:45,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:38:45,743 INFO L87 Difference]: Start difference. First operand 263 states and 800 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:45,815 INFO L93 Difference]: Finished difference Result 474 states and 1387 transitions. [2021-07-13 19:38:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:38:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:45,816 INFO L225 Difference]: With dead ends: 474 [2021-07-13 19:38:45,816 INFO L226 Difference]: Without dead ends: 370 [2021-07-13 19:38:45,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:38:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-13 19:38:45,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 307. [2021-07-13 19:38:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 3.0718954248366015) internal successors, (940), 306 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 940 transitions. [2021-07-13 19:38:45,819 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 940 transitions. Word has length 19 [2021-07-13 19:38:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:45,819 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 940 transitions. [2021-07-13 19:38:45,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:45,820 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 940 transitions. [2021-07-13 19:38:45,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:45,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:45,820 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 19:38:46,021 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1443659084, now seen corresponding path program 1 times [2021-07-13 19:38:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043394888] [2021-07-13 19:38:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:46,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043394888] [2021-07-13 19:38:46,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043394888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334857793] [2021-07-13 19:38:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:46,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:46,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:46,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:46,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:46,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:38:46,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:38:46,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:38:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:46,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334857793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:46,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:46,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477324788] [2021-07-13 19:38:46,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:46,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:46,521 INFO L87 Difference]: Start difference. First operand 307 states and 940 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:46,838 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-07-13 19:38:47,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:47,147 INFO L93 Difference]: Finished difference Result 475 states and 1332 transitions. [2021-07-13 19:38:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:38:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:47,148 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:38:47,148 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:38:47,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:38:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:38:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 317. [2021-07-13 19:38:47,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.0569620253164556) internal successors, (966), 316 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 966 transitions. [2021-07-13 19:38:47,152 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 966 transitions. Word has length 19 [2021-07-13 19:38:47,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:47,152 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 966 transitions. [2021-07-13 19:38:47,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:47,152 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 966 transitions. [2021-07-13 19:38:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:47,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:47,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:47,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:47,353 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:47,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:47,353 INFO L82 PathProgramCache]: Analyzing trace with hash -979539610, now seen corresponding path program 2 times [2021-07-13 19:38:47,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:47,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209638518] [2021-07-13 19:38:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209638518] [2021-07-13 19:38:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209638518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523935481] [2021-07-13 19:38:47,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:47,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:47,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:47,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:47,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:47,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:47,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:47,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:47,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:47,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:47,926 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:47,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:47,927 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:38:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:47,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523935481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:47,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:47,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:47,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029433756] [2021-07-13 19:38:47,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:47,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:47,998 INFO L87 Difference]: Start difference. First operand 317 states and 966 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:48,817 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-07-13 19:38:48,937 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-07-13 19:38:49,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:49,088 INFO L93 Difference]: Finished difference Result 483 states and 1370 transitions. [2021-07-13 19:38:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:38:49,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:49,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:49,089 INFO L225 Difference]: With dead ends: 483 [2021-07-13 19:38:49,089 INFO L226 Difference]: Without dead ends: 454 [2021-07-13 19:38:49,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1259.4ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:38:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-07-13 19:38:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 320. [2021-07-13 19:38:49,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 3.053291536050157) internal successors, (974), 319 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 974 transitions. [2021-07-13 19:38:49,095 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 974 transitions. Word has length 19 [2021-07-13 19:38:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:49,095 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 974 transitions. [2021-07-13 19:38:49,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:49,095 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 974 transitions. [2021-07-13 19:38:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:49,095 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:49,095 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:49,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,318 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:49,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:49,318 INFO L82 PathProgramCache]: Analyzing trace with hash 114551978, now seen corresponding path program 3 times [2021-07-13 19:38:49,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:49,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814437225] [2021-07-13 19:38:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:49,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814437225] [2021-07-13 19:38:49,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814437225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392874142] [2021-07-13 19:38:49,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:49,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:38:49,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:49,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:49,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:49,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:49,755 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:49,759 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:49,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:49,765 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:49,768 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:49,804 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-07-13 19:38:49,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:49,813 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-07-13 19:38:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:49,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392874142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:49,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:49,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:49,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52051821] [2021-07-13 19:38:49,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:49,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:49,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:49,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:49,891 INFO L87 Difference]: Start difference. First operand 320 states and 974 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:50,497 INFO L93 Difference]: Finished difference Result 442 states and 1271 transitions. [2021-07-13 19:38:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:50,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:50,499 INFO L225 Difference]: With dead ends: 442 [2021-07-13 19:38:50,499 INFO L226 Difference]: Without dead ends: 413 [2021-07-13 19:38:50,499 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 748.7ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-07-13 19:38:50,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 326. [2021-07-13 19:38:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.046153846153846) internal successors, (990), 325 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 990 transitions. [2021-07-13 19:38:50,504 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 990 transitions. Word has length 19 [2021-07-13 19:38:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:50,504 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 990 transitions. [2021-07-13 19:38:50,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 990 transitions. [2021-07-13 19:38:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:50,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:50,505 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:50,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:50,713 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1325886340, now seen corresponding path program 4 times [2021-07-13 19:38:50,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:50,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475379908] [2021-07-13 19:38:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:50,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:50,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475379908] [2021-07-13 19:38:50,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475379908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:50,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026302571] [2021-07-13 19:38:50,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:50,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:38:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:51,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,065 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:51,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:51,073 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:51,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,080 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:51,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:51,101 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,107 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,112 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:51,116 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:51,190 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-07-13 19:38:51,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:51,191 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:38:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:51,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026302571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:51,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:51,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:51,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640536097] [2021-07-13 19:38:51,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:51,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:51,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:51,322 INFO L87 Difference]: Start difference. First operand 326 states and 990 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,022 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2021-07-13 19:38:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:52,052 INFO L93 Difference]: Finished difference Result 466 states and 1319 transitions. [2021-07-13 19:38:52,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:52,052 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:52,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:52,053 INFO L225 Difference]: With dead ends: 466 [2021-07-13 19:38:52,053 INFO L226 Difference]: Without dead ends: 416 [2021-07-13 19:38:52,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 820.0ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:52,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-07-13 19:38:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 329. [2021-07-13 19:38:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.042682926829268) internal successors, (998), 328 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 998 transitions. [2021-07-13 19:38:52,057 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 998 transitions. Word has length 19 [2021-07-13 19:38:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:52,057 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 998 transitions. [2021-07-13 19:38:52,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 998 transitions. [2021-07-13 19:38:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:52,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:52,058 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:52,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-07-13 19:38:52,259 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash 822910196, now seen corresponding path program 5 times [2021-07-13 19:38:52,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:52,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67417344] [2021-07-13 19:38:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67417344] [2021-07-13 19:38:52,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67417344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631066163] [2021-07-13 19:38:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:52,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:38:52,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:52,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:52,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:52,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:52,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:52,583 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:52,587 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:52,590 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:52,593 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:52,597 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:52,601 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:52,605 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:52,608 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:52,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:52,676 INFO L628 ElimStorePlain]: treesize reduction 58, result has 50.4 percent of original size [2021-07-13 19:38:52,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:52,677 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-07-13 19:38:52,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:52,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631066163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:52,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:52,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:38:52,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841115561] [2021-07-13 19:38:52,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:38:52,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:38:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:38:52,783 INFO L87 Difference]: Start difference. First operand 329 states and 998 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:53,468 INFO L93 Difference]: Finished difference Result 507 states and 1422 transitions. [2021-07-13 19:38:53,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:53,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:53,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:53,470 INFO L225 Difference]: With dead ends: 507 [2021-07-13 19:38:53,470 INFO L226 Difference]: Without dead ends: 464 [2021-07-13 19:38:53,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 769.4ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-07-13 19:38:53,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 344. [2021-07-13 19:38:53,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.043731778425656) internal successors, (1044), 343 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1044 transitions. [2021-07-13 19:38:53,474 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1044 transitions. Word has length 19 [2021-07-13 19:38:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:53,474 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 1044 transitions. [2021-07-13 19:38:53,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1044 transitions. [2021-07-13 19:38:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:53,475 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:53,475 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:53,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2021-07-13 19:38:53,675 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:53,676 INFO L82 PathProgramCache]: Analyzing trace with hash -771246302, now seen corresponding path program 6 times [2021-07-13 19:38:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:53,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944706817] [2021-07-13 19:38:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:53,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:53,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944706817] [2021-07-13 19:38:53,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944706817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:53,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587569278] [2021-07-13 19:38:53,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:53,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:38:53,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:53,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:53,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:54,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:54,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:54,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:38:54,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:38:54,086 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:54,125 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:38:54,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:54,127 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:38:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:54,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587569278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:54,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:54,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551655983] [2021-07-13 19:38:54,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:54,205 INFO L87 Difference]: Start difference. First operand 344 states and 1044 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:54,661 INFO L93 Difference]: Finished difference Result 480 states and 1384 transitions. [2021-07-13 19:38:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:38:54,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:54,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:54,662 INFO L225 Difference]: With dead ends: 480 [2021-07-13 19:38:54,662 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:38:54,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 593.6ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:38:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:38:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 360. [2021-07-13 19:38:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 3.0250696378830084) internal successors, (1086), 359 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1086 transitions. [2021-07-13 19:38:54,666 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1086 transitions. Word has length 19 [2021-07-13 19:38:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:54,667 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1086 transitions. [2021-07-13 19:38:54,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1086 transitions. [2021-07-13 19:38:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:54,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:54,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:54,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:54,868 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:54,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:54,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2083282676, now seen corresponding path program 7 times [2021-07-13 19:38:54,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:54,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975370252] [2021-07-13 19:38:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975370252] [2021-07-13 19:38:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975370252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31972901] [2021-07-13 19:38:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:38:55,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:55,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:55,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:55,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:55,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:55,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:55,241 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:55,246 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:55,321 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-07-13 19:38:55,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:55,322 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:266, output treesize:67 [2021-07-13 19:38:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31972901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:55,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:55,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272668516] [2021-07-13 19:38:55,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:55,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:55,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:55,457 INFO L87 Difference]: Start difference. First operand 360 states and 1086 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:56,157 INFO L93 Difference]: Finished difference Result 535 states and 1491 transitions. [2021-07-13 19:38:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:38:56,157 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:56,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:56,158 INFO L225 Difference]: With dead ends: 535 [2021-07-13 19:38:56,158 INFO L226 Difference]: Without dead ends: 492 [2021-07-13 19:38:56,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 823.3ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:38:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-07-13 19:38:56,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 369. [2021-07-13 19:38:56,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.0407608695652173) internal successors, (1119), 368 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1119 transitions. [2021-07-13 19:38:56,163 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1119 transitions. Word has length 19 [2021-07-13 19:38:56,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:56,163 INFO L482 AbstractCegarLoop]: Abstraction has 369 states and 1119 transitions. [2021-07-13 19:38:56,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:56,163 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1119 transitions. [2021-07-13 19:38:56,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:56,163 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:56,163 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:56,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-13 19:38:56,364 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash -62888084, now seen corresponding path program 8 times [2021-07-13 19:38:56,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:56,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604385651] [2021-07-13 19:38:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604385651] [2021-07-13 19:38:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604385651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249555335] [2021-07-13 19:38:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:56,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:38:56,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:56,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:56,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:56,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:56,690 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:56,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:56,698 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:56,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,704 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,705 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,717 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:56,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:56,725 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:56,729 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:56,733 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:56,784 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:38:56,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:56,785 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:38:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:56,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249555335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:56,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:56,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:56,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21156936] [2021-07-13 19:38:56,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:56,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:56,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:56,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:56,934 INFO L87 Difference]: Start difference. First operand 369 states and 1119 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:38:57,644 INFO L93 Difference]: Finished difference Result 548 states and 1558 transitions. [2021-07-13 19:38:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:38:57,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:38:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:38:57,645 INFO L225 Difference]: With dead ends: 548 [2021-07-13 19:38:57,645 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:38:57,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 739.4ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:38:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:38:57,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2021-07-13 19:38:57,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 3.0716180371352784) internal successors, (1158), 377 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1158 transitions. [2021-07-13 19:38:57,651 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1158 transitions. Word has length 19 [2021-07-13 19:38:57,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:38:57,651 INFO L482 AbstractCegarLoop]: Abstraction has 378 states and 1158 transitions. [2021-07-13 19:38:57,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:57,651 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1158 transitions. [2021-07-13 19:38:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:38:57,651 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:38:57,651 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:38:57,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:57,852 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:38:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:38:57,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1075580616, now seen corresponding path program 9 times [2021-07-13 19:38:57,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:38:57,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419080663] [2021-07-13 19:38:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:38:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:38:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:38:58,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419080663] [2021-07-13 19:38:58,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419080663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073874129] [2021-07-13 19:38:58,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:38:58,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:38:58,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:38:58,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:38:58,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:38:58,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:58,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:58,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:38:58,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:38:58,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:38:58,368 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:58,372 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:58,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:38:58,378 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:38:58,381 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:38:58,385 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:38:58,440 INFO L628 ElimStorePlain]: treesize reduction 32, result has 65.6 percent of original size [2021-07-13 19:38:58,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:38:58,441 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:358, output treesize:61 [2021-07-13 19:38:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:38:58,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073874129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:38:58,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:38:58,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:38:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718271065] [2021-07-13 19:38:58,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:38:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:38:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:38:58,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:38:58,540 INFO L87 Difference]: Start difference. First operand 378 states and 1158 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:38:58,900 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-13 19:38:59,025 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-07-13 19:38:59,167 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2021-07-13 19:38:59,295 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2021-07-13 19:38:59,428 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2021-07-13 19:38:59,573 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-13 19:38:59,703 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2021-07-13 19:38:59,848 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-07-13 19:39:00,005 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 19:39:00,253 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 19:39:00,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:00,275 INFO L93 Difference]: Finished difference Result 630 states and 1766 transitions. [2021-07-13 19:39:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:39:00,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:00,276 INFO L225 Difference]: With dead ends: 630 [2021-07-13 19:39:00,276 INFO L226 Difference]: Without dead ends: 600 [2021-07-13 19:39:00,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1908.4ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:39:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2021-07-13 19:39:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 387. [2021-07-13 19:39:00,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 3.062176165803109) internal successors, (1182), 386 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1182 transitions. [2021-07-13 19:39:00,282 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1182 transitions. Word has length 19 [2021-07-13 19:39:00,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:00,282 INFO L482 AbstractCegarLoop]: Abstraction has 387 states and 1182 transitions. [2021-07-13 19:39:00,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1182 transitions. [2021-07-13 19:39:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:00,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:00,283 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:00,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-07-13 19:39:00,483 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -304728262, now seen corresponding path program 10 times [2021-07-13 19:39:00,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:00,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625831364] [2021-07-13 19:39:00,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:00,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625831364] [2021-07-13 19:39:00,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625831364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812878212] [2021-07-13 19:39:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:00,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:00,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:00,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:00,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:00,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:00,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:00,869 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:39:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:00,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812878212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:00,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:00,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480917828] [2021-07-13 19:39:00,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:00,936 INFO L87 Difference]: Start difference. First operand 387 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:01,612 INFO L93 Difference]: Finished difference Result 656 states and 1844 transitions. [2021-07-13 19:39:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:01,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:01,613 INFO L225 Difference]: With dead ends: 656 [2021-07-13 19:39:01,613 INFO L226 Difference]: Without dead ends: 616 [2021-07-13 19:39:01,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 774.6ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-07-13 19:39:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 399. [2021-07-13 19:39:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 3.0603015075376883) internal successors, (1218), 398 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1218 transitions. [2021-07-13 19:39:01,619 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1218 transitions. Word has length 19 [2021-07-13 19:39:01,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:01,619 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 1218 transitions. [2021-07-13 19:39:01,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1218 transitions. [2021-07-13 19:39:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:01,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:01,619 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:01,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-13 19:39:01,820 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:01,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:01,820 INFO L82 PathProgramCache]: Analyzing trace with hash 159391212, now seen corresponding path program 11 times [2021-07-13 19:39:01,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:01,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392315068] [2021-07-13 19:39:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:01,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392315068] [2021-07-13 19:39:01,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392315068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:01,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533638718] [2021-07-13 19:39:01,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:02,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:02,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:02,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:02,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:02,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:02,262 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:02,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:02,270 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:02,274 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:02,316 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-07-13 19:39:02,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:02,317 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-07-13 19:39:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:02,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533638718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:02,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:02,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:02,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196029512] [2021-07-13 19:39:02,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:02,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:02,388 INFO L87 Difference]: Start difference. First operand 399 states and 1218 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:03,318 INFO L93 Difference]: Finished difference Result 657 states and 1867 transitions. [2021-07-13 19:39:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:39:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:03,320 INFO L225 Difference]: With dead ends: 657 [2021-07-13 19:39:03,320 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:39:03,320 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1002.6ms TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:39:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 402. [2021-07-13 19:39:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 3.064837905236908) internal successors, (1229), 401 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1229 transitions. [2021-07-13 19:39:03,328 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1229 transitions. Word has length 19 [2021-07-13 19:39:03,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:03,328 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 1229 transitions. [2021-07-13 19:39:03,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1229 transitions. [2021-07-13 19:39:03,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:03,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:03,329 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:03,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-13 19:39:03,545 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1253482800, now seen corresponding path program 12 times [2021-07-13 19:39:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:03,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920317291] [2021-07-13 19:39:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:03,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920317291] [2021-07-13 19:39:03,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920317291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:03,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772998682] [2021-07-13 19:39:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:03,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:03,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:03,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:03,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:03,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:03,923 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:03,926 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:03,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:03,963 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:39:03,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:03,964 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:39:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:04,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772998682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:04,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:04,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:04,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100118137] [2021-07-13 19:39:04,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:04,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:04,030 INFO L87 Difference]: Start difference. First operand 402 states and 1229 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:04,708 INFO L93 Difference]: Finished difference Result 662 states and 1878 transitions. [2021-07-13 19:39:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:04,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:04,709 INFO L225 Difference]: With dead ends: 662 [2021-07-13 19:39:04,709 INFO L226 Difference]: Without dead ends: 647 [2021-07-13 19:39:04,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:04,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-07-13 19:39:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 408. [2021-07-13 19:39:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-07-13 19:39:04,715 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-07-13 19:39:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:04,715 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-07-13 19:39:04,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:04,715 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-07-13 19:39:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:04,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:04,715 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:04,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-07-13 19:39:04,916 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:04,916 INFO L82 PathProgramCache]: Analyzing trace with hash -186955518, now seen corresponding path program 13 times [2021-07-13 19:39:04,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:04,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468755223] [2021-07-13 19:39:04,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:05,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468755223] [2021-07-13 19:39:05,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468755223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120027963] [2021-07-13 19:39:05,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:05,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:05,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:05,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:05,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:05,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:05,364 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:05,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:05,376 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:05,380 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:05,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:05,389 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:05,468 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-07-13 19:39:05,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:05,469 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:39:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120027963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:05,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:05,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20555202] [2021-07-13 19:39:05,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:05,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:05,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:05,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:05,617 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:06,807 INFO L93 Difference]: Finished difference Result 724 states and 2000 transitions. [2021-07-13 19:39:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:39:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:06,808 INFO L225 Difference]: With dead ends: 724 [2021-07-13 19:39:06,808 INFO L226 Difference]: Without dead ends: 674 [2021-07-13 19:39:06,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1316.1ms TimeCoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:06,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-07-13 19:39:06,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 408. [2021-07-13 19:39:06,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-07-13 19:39:06,814 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-07-13 19:39:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:06,814 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-07-13 19:39:06,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-07-13 19:39:06,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:06,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:06,815 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:07,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,015 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1961841018, now seen corresponding path program 14 times [2021-07-13 19:39:07,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:07,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886941176] [2021-07-13 19:39:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:07,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886941176] [2021-07-13 19:39:07,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886941176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036597785] [2021-07-13 19:39:07,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:07,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:07,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:07,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:07,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:07,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:07,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:07,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:07,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:07,398 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-07-13 19:39:07,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:07,399 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:202, output treesize:61 [2021-07-13 19:39:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:07,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036597785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:07,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:07,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:39:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355621220] [2021-07-13 19:39:07,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:39:07,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:39:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:39:07,527 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:08,165 INFO L93 Difference]: Finished difference Result 616 states and 1773 transitions. [2021-07-13 19:39:08,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:08,166 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:08,166 INFO L225 Difference]: With dead ends: 616 [2021-07-13 19:39:08,167 INFO L226 Difference]: Without dead ends: 586 [2021-07-13 19:39:08,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-07-13 19:39:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 408. [2021-07-13 19:39:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 3.0663390663390664) internal successors, (1248), 407 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1248 transitions. [2021-07-13 19:39:08,172 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1248 transitions. Word has length 19 [2021-07-13 19:39:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:08,172 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1248 transitions. [2021-07-13 19:39:08,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1248 transitions. [2021-07-13 19:39:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:08,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:08,173 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:08,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-13 19:39:08,373 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:08,374 INFO L82 PathProgramCache]: Analyzing trace with hash 236586928, now seen corresponding path program 15 times [2021-07-13 19:39:08,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:08,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563881876] [2021-07-13 19:39:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:08,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563881876] [2021-07-13 19:39:08,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563881876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324422829] [2021-07-13 19:39:08,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:08,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:08,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:08,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:08,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:08,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:08,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:08,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:08,804 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:08,807 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:08,843 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:39:08,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:08,844 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:39:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:08,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324422829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:08,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:08,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:08,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280361314] [2021-07-13 19:39:08,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:08,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:08,911 INFO L87 Difference]: Start difference. First operand 408 states and 1248 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:09,576 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 41 [2021-07-13 19:39:10,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:10,142 INFO L93 Difference]: Finished difference Result 772 states and 2161 transitions. [2021-07-13 19:39:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:39:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:10,143 INFO L225 Difference]: With dead ends: 772 [2021-07-13 19:39:10,143 INFO L226 Difference]: Without dead ends: 710 [2021-07-13 19:39:10,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:10,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-07-13 19:39:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 425. [2021-07-13 19:39:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-07-13 19:39:10,152 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-07-13 19:39:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:10,152 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-07-13 19:39:10,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-07-13 19:39:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:10,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:10,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:10,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-07-13 19:39:10,369 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash -678427472, now seen corresponding path program 16 times [2021-07-13 19:39:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:10,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765867774] [2021-07-13 19:39:10,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:10,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765867774] [2021-07-13 19:39:10,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765867774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48698738] [2021-07-13 19:39:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:10,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:10,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:10,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:10,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:10,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:10,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:10,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:39:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:10,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48698738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:10,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:10,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444706377] [2021-07-13 19:39:10,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:10,921 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:11,203 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-07-13 19:39:11,406 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-07-13 19:39:11,615 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 19:39:11,778 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2021-07-13 19:39:11,999 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 19:39:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:12,012 INFO L93 Difference]: Finished difference Result 640 states and 1840 transitions. [2021-07-13 19:39:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:12,013 INFO L225 Difference]: With dead ends: 640 [2021-07-13 19:39:12,013 INFO L226 Difference]: Without dead ends: 611 [2021-07-13 19:39:12,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1263.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:39:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-13 19:39:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 427. [2021-07-13 19:39:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 3.056338028169014) internal successors, (1302), 426 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1302 transitions. [2021-07-13 19:39:12,019 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1302 transitions. Word has length 19 [2021-07-13 19:39:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:12,019 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1302 transitions. [2021-07-13 19:39:12,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1302 transitions. [2021-07-13 19:39:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:12,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:12,019 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:12,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-13 19:39:12,221 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1445273620, now seen corresponding path program 17 times [2021-07-13 19:39:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:12,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779737162] [2021-07-13 19:39:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779737162] [2021-07-13 19:39:12,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779737162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914013905] [2021-07-13 19:39:12,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:12,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:12,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:12,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:12,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:12,681 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:12,685 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:12,688 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:12,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:12,746 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-07-13 19:39:12,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:12,747 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-07-13 19:39:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:12,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914013905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:12,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:12,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:12,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311234450] [2021-07-13 19:39:12,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:12,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:12,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:12,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:12,862 INFO L87 Difference]: Start difference. First operand 427 states and 1302 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:13,166 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-07-13 19:39:13,369 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2021-07-13 19:39:13,577 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-07-13 19:39:13,835 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-07-13 19:39:14,070 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-13 19:39:14,289 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-13 19:39:14,509 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 19:39:14,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:14,533 INFO L93 Difference]: Finished difference Result 698 states and 1967 transitions. [2021-07-13 19:39:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:14,535 INFO L225 Difference]: With dead ends: 698 [2021-07-13 19:39:14,535 INFO L226 Difference]: Without dead ends: 654 [2021-07-13 19:39:14,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1798.0ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-07-13 19:39:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 425. [2021-07-13 19:39:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 3.0542452830188678) internal successors, (1295), 424 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1295 transitions. [2021-07-13 19:39:14,540 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1295 transitions. Word has length 19 [2021-07-13 19:39:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:14,541 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1295 transitions. [2021-07-13 19:39:14,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1295 transitions. [2021-07-13 19:39:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:14,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:14,541 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:14,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-07-13 19:39:14,742 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:14,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1969462800, now seen corresponding path program 18 times [2021-07-13 19:39:14,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:14,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495655319] [2021-07-13 19:39:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:14,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:14,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495655319] [2021-07-13 19:39:14,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495655319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:14,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808502240] [2021-07-13 19:39:14,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:14,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:14,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:15,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:15,260 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:15,263 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,267 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:15,271 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:15,275 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:15,278 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:15,323 INFO L628 ElimStorePlain]: treesize reduction 59, result has 42.2 percent of original size [2021-07-13 19:39:15,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:15,324 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:234, output treesize:43 [2021-07-13 19:39:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:15,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808502240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:15,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:15,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:15,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582000247] [2021-07-13 19:39:15,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:15,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:15,394 INFO L87 Difference]: Start difference. First operand 425 states and 1295 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,127 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 19:39:16,249 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-07-13 19:39:16,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:16,300 INFO L93 Difference]: Finished difference Result 673 states and 1948 transitions. [2021-07-13 19:39:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:16,302 INFO L225 Difference]: With dead ends: 673 [2021-07-13 19:39:16,302 INFO L226 Difference]: Without dead ends: 644 [2021-07-13 19:39:16,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-13 19:39:16,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 428. [2021-07-13 19:39:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 3.0679156908665104) internal successors, (1310), 427 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1310 transitions. [2021-07-13 19:39:16,307 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1310 transitions. Word has length 19 [2021-07-13 19:39:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:16,307 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 1310 transitions. [2021-07-13 19:39:16,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1310 transitions. [2021-07-13 19:39:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:16,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:16,308 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:16,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2021-07-13 19:39:16,509 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:16,509 INFO L82 PathProgramCache]: Analyzing trace with hash -786696720, now seen corresponding path program 19 times [2021-07-13 19:39:16,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:16,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415916343] [2021-07-13 19:39:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:16,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415916343] [2021-07-13 19:39:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415916343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468724852] [2021-07-13 19:39:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:16,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:16,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:16,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:16,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:16,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:16,946 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:16,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:16,954 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:16,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:16,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:17,052 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-07-13 19:39:17,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:39:17,056 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-07-13 19:39:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:17,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468724852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:17,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:17,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:17,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679673759] [2021-07-13 19:39:17,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:17,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:17,210 INFO L87 Difference]: Start difference. First operand 428 states and 1310 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:17,469 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:39:17,830 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-07-13 19:39:18,021 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-13 19:39:18,161 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-07-13 19:39:18,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:18,186 INFO L93 Difference]: Finished difference Result 664 states and 1911 transitions. [2021-07-13 19:39:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:18,187 INFO L225 Difference]: With dead ends: 664 [2021-07-13 19:39:18,187 INFO L226 Difference]: Without dead ends: 642 [2021-07-13 19:39:18,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1128.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:39:18,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-07-13 19:39:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 430. [2021-07-13 19:39:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.06993006993007) internal successors, (1317), 429 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1317 transitions. [2021-07-13 19:39:18,193 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1317 transitions. Word has length 19 [2021-07-13 19:39:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:18,193 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1317 transitions. [2021-07-13 19:39:18,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:18,193 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1317 transitions. [2021-07-13 19:39:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:18,194 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:18,194 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:18,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,394 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:18,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:18,394 INFO L82 PathProgramCache]: Analyzing trace with hash 792680752, now seen corresponding path program 20 times [2021-07-13 19:39:18,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:18,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622317986] [2021-07-13 19:39:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:18,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622317986] [2021-07-13 19:39:18,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622317986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:18,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901380290] [2021-07-13 19:39:18,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:18,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:18,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:18,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:18,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:18,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:18,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:18,867 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:18,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,878 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:18,884 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:18,895 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:18,900 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:18,906 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:18,916 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,921 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,927 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:18,933 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:18,938 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:18,944 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:18,949 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:18,955 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:18,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:18,959 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:19,151 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:39:19,151 INFO L628 ElimStorePlain]: treesize reduction 205, result has 46.6 percent of original size [2021-07-13 19:39:19,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:19,154 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 1 variables, input treesize:807, output treesize:179 [2021-07-13 19:39:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:19,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901380290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:19,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:19,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:19,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835044536] [2021-07-13 19:39:19,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:19,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:19,400 INFO L87 Difference]: Start difference. First operand 430 states and 1317 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,103 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 19:39:20,258 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2021-07-13 19:39:20,416 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2021-07-13 19:39:20,606 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2021-07-13 19:39:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:20,610 INFO L93 Difference]: Finished difference Result 709 states and 2045 transitions. [2021-07-13 19:39:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:20,612 INFO L225 Difference]: With dead ends: 709 [2021-07-13 19:39:20,612 INFO L226 Difference]: Without dead ends: 694 [2021-07-13 19:39:20,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1446.9ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-07-13 19:39:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 435. [2021-07-13 19:39:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.089861751152074) internal successors, (1341), 434 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1341 transitions. [2021-07-13 19:39:20,618 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1341 transitions. Word has length 19 [2021-07-13 19:39:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:20,618 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1341 transitions. [2021-07-13 19:39:20,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:20,618 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1341 transitions. [2021-07-13 19:39:20,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:20,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:20,618 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:20,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-13 19:39:20,819 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:20,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:20,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2085023152, now seen corresponding path program 21 times [2021-07-13 19:39:20,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:20,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866655061] [2021-07-13 19:39:20,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:20,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:20,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866655061] [2021-07-13 19:39:20,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866655061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:20,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295479142] [2021-07-13 19:39:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:21,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:21,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:21,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:21,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:21,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:21,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:21,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:21,184 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:21,193 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:21,202 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,206 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:21,210 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:21,215 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,219 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:21,223 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,228 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,232 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:21,236 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:21,240 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:21,245 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:21,266 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:21,271 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:21,275 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:21,280 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:21,451 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:39:21,451 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-07-13 19:39:21,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:21,453 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-07-13 19:39:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:21,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295479142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:21,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:21,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:21,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602138850] [2021-07-13 19:39:21,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:21,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:21,745 INFO L87 Difference]: Start difference. First operand 435 states and 1341 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:22,428 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-13 19:39:22,629 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-07-13 19:39:22,898 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 19:39:23,136 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-13 19:39:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:23,182 INFO L93 Difference]: Finished difference Result 683 states and 1966 transitions. [2021-07-13 19:39:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:23,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:23,183 INFO L225 Difference]: With dead ends: 683 [2021-07-13 19:39:23,183 INFO L226 Difference]: Without dead ends: 668 [2021-07-13 19:39:23,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1642.6ms TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-07-13 19:39:23,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 431. [2021-07-13 19:39:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 3.0767441860465117) internal successors, (1323), 430 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1323 transitions. [2021-07-13 19:39:23,189 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1323 transitions. Word has length 19 [2021-07-13 19:39:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:23,189 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 1323 transitions. [2021-07-13 19:39:23,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:23,189 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1323 transitions. [2021-07-13 19:39:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:23,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:23,189 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:23,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-07-13 19:39:23,398 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:23,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:23,398 INFO L82 PathProgramCache]: Analyzing trace with hash 82616162, now seen corresponding path program 22 times [2021-07-13 19:39:23,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:23,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313455343] [2021-07-13 19:39:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313455343] [2021-07-13 19:39:23,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313455343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194623169] [2021-07-13 19:39:23,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:23,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:23,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:23,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:23,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:23,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:23,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:23,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:23,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:23,861 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-07-13 19:39:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:23,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194623169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:23,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:23,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:23,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974080803] [2021-07-13 19:39:23,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:23,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:23,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:23,922 INFO L87 Difference]: Start difference. First operand 431 states and 1323 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,467 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-07-13 19:39:24,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:24,687 INFO L93 Difference]: Finished difference Result 647 states and 1852 transitions. [2021-07-13 19:39:24,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:39:24,688 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:24,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:24,689 INFO L225 Difference]: With dead ends: 647 [2021-07-13 19:39:24,689 INFO L226 Difference]: Without dead ends: 618 [2021-07-13 19:39:24,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 917.7ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:24,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-07-13 19:39:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 438. [2021-07-13 19:39:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-07-13 19:39:24,697 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-07-13 19:39:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:24,697 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-07-13 19:39:24,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-07-13 19:39:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:24,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:24,698 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:24,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-07-13 19:39:24,905 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1357822156, now seen corresponding path program 23 times [2021-07-13 19:39:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:24,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340149919] [2021-07-13 19:39:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340149919] [2021-07-13 19:39:25,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340149919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908428035] [2021-07-13 19:39:25,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:25,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:25,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:25,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:25,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:25,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:25,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:25,295 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:25,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,302 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:25,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:25,306 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:25,310 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:25,313 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:25,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:25,320 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:25,371 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:39:25,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:25,372 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:39:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:25,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908428035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:25,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:25,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199120979] [2021-07-13 19:39:25,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:25,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:25,494 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:26,488 INFO L93 Difference]: Finished difference Result 680 states and 1939 transitions. [2021-07-13 19:39:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:39:26,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:26,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:26,490 INFO L225 Difference]: With dead ends: 680 [2021-07-13 19:39:26,490 INFO L226 Difference]: Without dead ends: 636 [2021-07-13 19:39:26,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1006.8ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:26,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-07-13 19:39:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 435. [2021-07-13 19:39:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 3.0806451612903225) internal successors, (1337), 434 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1337 transitions. [2021-07-13 19:39:26,495 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1337 transitions. Word has length 19 [2021-07-13 19:39:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:26,495 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1337 transitions. [2021-07-13 19:39:26,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1337 transitions. [2021-07-13 19:39:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:26,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:26,496 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:26,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2021-07-13 19:39:26,696 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:26,697 INFO L82 PathProgramCache]: Analyzing trace with hash 790974380, now seen corresponding path program 24 times [2021-07-13 19:39:26,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:26,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772288593] [2021-07-13 19:39:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:26,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772288593] [2021-07-13 19:39:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772288593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966595323] [2021-07-13 19:39:26,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:26,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:26,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:27,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:27,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:27,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:27,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:27,034 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:27,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:27,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:27,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:27,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:27,049 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:27,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:27,056 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:27,107 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:39:27,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:27,108 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:39:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966595323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:27,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:27,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:27,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194543562] [2021-07-13 19:39:27,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:27,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:27,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:27,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:27,215 INFO L87 Difference]: Start difference. First operand 435 states and 1337 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,086 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-13 19:39:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:28,233 INFO L93 Difference]: Finished difference Result 683 states and 1935 transitions. [2021-07-13 19:39:28,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:39:28,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:28,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:28,234 INFO L225 Difference]: With dead ends: 683 [2021-07-13 19:39:28,234 INFO L226 Difference]: Without dead ends: 653 [2021-07-13 19:39:28,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1063.2ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:28,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-07-13 19:39:28,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 438. [2021-07-13 19:39:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.0846681922196795) internal successors, (1348), 437 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1348 transitions. [2021-07-13 19:39:28,241 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1348 transitions. Word has length 19 [2021-07-13 19:39:28,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:28,241 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1348 transitions. [2021-07-13 19:39:28,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:28,241 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1348 transitions. [2021-07-13 19:39:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:28,241 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:28,241 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:28,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,442 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:28,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:28,442 INFO L82 PathProgramCache]: Analyzing trace with hash -702933342, now seen corresponding path program 25 times [2021-07-13 19:39:28,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:28,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663273729] [2021-07-13 19:39:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:28,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663273729] [2021-07-13 19:39:28,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663273729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139155313] [2021-07-13 19:39:28,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:28,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:28,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:28,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:28,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:28,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:28,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:28,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:28,828 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:28,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:28,870 INFO L628 ElimStorePlain]: treesize reduction 35, result has 55.1 percent of original size [2021-07-13 19:39:28,870 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:28,871 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-07-13 19:39:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139155313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:28,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:28,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302288567] [2021-07-13 19:39:28,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:28,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:28,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:28,939 INFO L87 Difference]: Start difference. First operand 438 states and 1348 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:29,657 INFO L93 Difference]: Finished difference Result 585 states and 1709 transitions. [2021-07-13 19:39:29,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:29,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:29,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:29,658 INFO L225 Difference]: With dead ends: 585 [2021-07-13 19:39:29,658 INFO L226 Difference]: Without dead ends: 558 [2021-07-13 19:39:29,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 798.9ms TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-13 19:39:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 438. [2021-07-13 19:39:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 3.077803203661327) internal successors, (1345), 437 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1345 transitions. [2021-07-13 19:39:29,663 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1345 transitions. Word has length 19 [2021-07-13 19:39:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:29,663 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1345 transitions. [2021-07-13 19:39:29,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:29,663 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1345 transitions. [2021-07-13 19:39:29,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:29,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:29,664 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:29,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-07-13 19:39:29,864 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:29,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1901193260, now seen corresponding path program 26 times [2021-07-13 19:39:29,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:29,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651868779] [2021-07-13 19:39:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:30,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651868779] [2021-07-13 19:39:30,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651868779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869429678] [2021-07-13 19:39:30,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:30,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:30,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:30,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:30,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:30,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:30,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:30,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:30,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:30,320 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:30,333 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:30,379 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-07-13 19:39:30,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:30,380 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:151, output treesize:43 [2021-07-13 19:39:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:30,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869429678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:30,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:30,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:30,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170108777] [2021-07-13 19:39:30,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:30,463 INFO L87 Difference]: Start difference. First operand 438 states and 1345 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:31,196 INFO L93 Difference]: Finished difference Result 618 states and 1805 transitions. [2021-07-13 19:39:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:31,198 INFO L225 Difference]: With dead ends: 618 [2021-07-13 19:39:31,198 INFO L226 Difference]: Without dead ends: 589 [2021-07-13 19:39:31,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 860.1ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-07-13 19:39:31,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 444. [2021-07-13 19:39:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 3.0880361173814896) internal successors, (1368), 443 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1368 transitions. [2021-07-13 19:39:31,203 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1368 transitions. Word has length 19 [2021-07-13 19:39:31,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:31,204 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1368 transitions. [2021-07-13 19:39:31,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:31,204 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1368 transitions. [2021-07-13 19:39:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:31,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:31,204 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:31,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable610 [2021-07-13 19:39:31,405 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:31,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:31,405 INFO L82 PathProgramCache]: Analyzing trace with hash 460754942, now seen corresponding path program 27 times [2021-07-13 19:39:31,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:31,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621432959] [2021-07-13 19:39:31,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621432959] [2021-07-13 19:39:31,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621432959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993385777] [2021-07-13 19:39:31,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:31,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:31,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:31,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:31,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:31,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:31,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:31,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:31,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,796 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:31,796 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:31,800 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:31,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:31,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:31,809 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:31,812 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,815 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:31,815 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:31,866 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:39:31,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:31,867 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:39:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:31,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993385777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:31,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:31,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:31,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285222994] [2021-07-13 19:39:31,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:31,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:31,975 INFO L87 Difference]: Start difference. First operand 444 states and 1368 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:32,823 INFO L93 Difference]: Finished difference Result 666 states and 1900 transitions. [2021-07-13 19:39:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:32,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:32,825 INFO L225 Difference]: With dead ends: 666 [2021-07-13 19:39:32,825 INFO L226 Difference]: Without dead ends: 622 [2021-07-13 19:39:32,825 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 946.2ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-07-13 19:39:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 441. [2021-07-13 19:39:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 3.090909090909091) internal successors, (1360), 440 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1360 transitions. [2021-07-13 19:39:32,830 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1360 transitions. Word has length 19 [2021-07-13 19:39:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:32,831 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1360 transitions. [2021-07-13 19:39:32,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1360 transitions. [2021-07-13 19:39:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:32,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:32,831 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:33,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-13 19:39:33,032 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:33,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1211007956, now seen corresponding path program 28 times [2021-07-13 19:39:33,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:33,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105970526] [2021-07-13 19:39:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:33,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105970526] [2021-07-13 19:39:33,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105970526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449557807] [2021-07-13 19:39:33,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:33,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:33,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:33,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:33,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:33,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:33,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:33,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:33,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:33,436 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:33,440 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:33,443 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:33,446 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:33,519 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-07-13 19:39:33,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:39:33,520 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-07-13 19:39:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:33,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449557807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:33,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:33,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:33,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640451442] [2021-07-13 19:39:33,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:33,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:33,640 INFO L87 Difference]: Start difference. First operand 441 states and 1360 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,185 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2021-07-13 19:39:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:34,440 INFO L93 Difference]: Finished difference Result 592 states and 1730 transitions. [2021-07-13 19:39:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:34,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:34,441 INFO L225 Difference]: With dead ends: 592 [2021-07-13 19:39:34,441 INFO L226 Difference]: Without dead ends: 570 [2021-07-13 19:39:34,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:39:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-07-13 19:39:34,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 439. [2021-07-13 19:39:34,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-07-13 19:39:34,447 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-07-13 19:39:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:34,447 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-07-13 19:39:34,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:34,447 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-07-13 19:39:34,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:34,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:34,448 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:34,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-07-13 19:39:34,648 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash 368369516, now seen corresponding path program 29 times [2021-07-13 19:39:34,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:34,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894775598] [2021-07-13 19:39:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:34,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894775598] [2021-07-13 19:39:34,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894775598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30959567] [2021-07-13 19:39:34,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:34,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:34,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:34,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:35,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:35,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:35,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:35,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:35,073 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:35,078 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:35,090 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:35,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:35,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:35,103 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:35,107 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:35,111 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:35,115 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:35,120 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:35,124 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:35,128 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:35,131 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:35,288 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:39:35,288 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:39:35,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:35,290 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:39:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30959567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:35,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:35,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:35,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475824905] [2021-07-13 19:39:35,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:35,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:35,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:35,491 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,063 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-13 19:39:36,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:36,285 INFO L93 Difference]: Finished difference Result 643 states and 1872 transitions. [2021-07-13 19:39:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:36,285 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:36,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:36,286 INFO L225 Difference]: With dead ends: 643 [2021-07-13 19:39:36,286 INFO L226 Difference]: Without dead ends: 628 [2021-07-13 19:39:36,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 956.3ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:39:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-07-13 19:39:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 442. [2021-07-13 19:39:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-07-13 19:39:36,292 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-07-13 19:39:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:36,292 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-07-13 19:39:36,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-07-13 19:39:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:36,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:36,293 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:36,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-13 19:39:36,496 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:36,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1992707284, now seen corresponding path program 30 times [2021-07-13 19:39:36,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:36,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838328711] [2021-07-13 19:39:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:36,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:36,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838328711] [2021-07-13 19:39:36,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838328711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:36,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657163548] [2021-07-13 19:39:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:36,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:36,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:36,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:36,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:36,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:36,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:36,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,926 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:36,931 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:36,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,941 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,946 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:36,951 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:36,956 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:36,961 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:36,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:36,965 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:37,130 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-13 19:39:37,130 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-07-13 19:39:37,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:37,132 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-07-13 19:39:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:37,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657163548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:37,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:37,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:37,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286550512] [2021-07-13 19:39:37,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:37,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:37,408 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:37,942 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-13 19:39:38,093 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-07-13 19:39:38,234 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 19:39:38,401 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 19:39:38,526 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-13 19:39:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:38,583 INFO L93 Difference]: Finished difference Result 626 states and 1833 transitions. [2021-07-13 19:39:38,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:38,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:38,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:38,584 INFO L225 Difference]: With dead ends: 626 [2021-07-13 19:39:38,584 INFO L226 Difference]: Without dead ends: 611 [2021-07-13 19:39:38,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1377.9ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:38,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-07-13 19:39:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 439. [2021-07-13 19:39:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.084474885844749) internal successors, (1351), 438 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1351 transitions. [2021-07-13 19:39:38,589 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1351 transitions. Word has length 19 [2021-07-13 19:39:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:38,589 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1351 transitions. [2021-07-13 19:39:38,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1351 transitions. [2021-07-13 19:39:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:38,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:38,590 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:38,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-07-13 19:39:38,791 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:38,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2072973826, now seen corresponding path program 31 times [2021-07-13 19:39:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:38,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643591930] [2021-07-13 19:39:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:38,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643591930] [2021-07-13 19:39:38,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643591930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:38,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549464425] [2021-07-13 19:39:38,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:39,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:39,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:39,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:39,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:39,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:39,198 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:39,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:39,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:39,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:39,213 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:39,216 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:39,219 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:39,223 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:39,226 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:39,277 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:39:39,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:39,278 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:39:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:39,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549464425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:39,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:39,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:39,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010893936] [2021-07-13 19:39:39,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:39,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:39,383 INFO L87 Difference]: Start difference. First operand 439 states and 1351 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:40,181 INFO L93 Difference]: Finished difference Result 657 states and 1908 transitions. [2021-07-13 19:39:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:40,182 INFO L225 Difference]: With dead ends: 657 [2021-07-13 19:39:40,183 INFO L226 Difference]: Without dead ends: 627 [2021-07-13 19:39:40,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 873.7ms TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-07-13 19:39:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 442. [2021-07-13 19:39:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-07-13 19:39:40,190 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-07-13 19:39:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:40,191 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-07-13 19:39:40,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-07-13 19:39:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:40,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:40,192 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:40,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-13 19:39:40,401 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:40,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:40,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1321573388, now seen corresponding path program 32 times [2021-07-13 19:39:40,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:40,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548787855] [2021-07-13 19:39:40,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:40,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548787855] [2021-07-13 19:39:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548787855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:40,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875336335] [2021-07-13 19:39:40,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:40,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:40,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:40,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:40,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:40,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:40,777 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:40,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:40,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:40,789 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:40,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:40,798 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:40,802 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:40,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:40,810 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:40,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:40,817 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:40,821 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:40,825 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:40,829 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:40,985 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:39:40,986 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:39:40,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:40,988 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:39:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:41,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875336335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:41,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:41,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:41,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301750163] [2021-07-13 19:39:41,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:41,190 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:41,890 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-13 19:39:42,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:42,162 INFO L93 Difference]: Finished difference Result 674 states and 1970 transitions. [2021-07-13 19:39:42,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:39:42,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:42,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:42,164 INFO L225 Difference]: With dead ends: 674 [2021-07-13 19:39:42,164 INFO L226 Difference]: Without dead ends: 659 [2021-07-13 19:39:42,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1076.5ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:39:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-07-13 19:39:42,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 447. [2021-07-13 19:39:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.116591928251121) internal successors, (1390), 446 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1390 transitions. [2021-07-13 19:39:42,171 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1390 transitions. Word has length 19 [2021-07-13 19:39:42,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:42,171 INFO L482 AbstractCegarLoop]: Abstraction has 447 states and 1390 transitions. [2021-07-13 19:39:42,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:42,171 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1390 transitions. [2021-07-13 19:39:42,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:42,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:42,172 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:42,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,373 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:42,373 INFO L82 PathProgramCache]: Analyzing trace with hash -29230988, now seen corresponding path program 33 times [2021-07-13 19:39:42,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:42,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818238892] [2021-07-13 19:39:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:42,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818238892] [2021-07-13 19:39:42,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818238892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:42,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15977152] [2021-07-13 19:39:42,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:42,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:39:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:42,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:42,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:42,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:42,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:42,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:42,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:42,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:42,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:42,740 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:42,757 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:42,763 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:42,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:42,773 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:42,777 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:42,782 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:42,787 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:42,792 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:42,796 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:42,977 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:39:42,978 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:39:42,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:39:42,980 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:39:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:43,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15977152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:43,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:43,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:43,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666963022] [2021-07-13 19:39:43,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:43,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:43,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:43,227 INFO L87 Difference]: Start difference. First operand 447 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:43,907 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-13 19:39:44,075 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-13 19:39:44,231 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 19:39:44,355 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-07-13 19:39:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:44,391 INFO L93 Difference]: Finished difference Result 648 states and 1904 transitions. [2021-07-13 19:39:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:44,392 INFO L225 Difference]: With dead ends: 648 [2021-07-13 19:39:44,392 INFO L226 Difference]: Without dead ends: 633 [2021-07-13 19:39:44,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1315.0ms TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-07-13 19:39:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 442. [2021-07-13 19:39:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.0975056689342404) internal successors, (1366), 441 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1366 transitions. [2021-07-13 19:39:44,398 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1366 transitions. Word has length 19 [2021-07-13 19:39:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:44,398 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1366 transitions. [2021-07-13 19:39:44,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1366 transitions. [2021-07-13 19:39:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:44,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:44,399 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:44,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-07-13 19:39:44,599 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1586593584, now seen corresponding path program 34 times [2021-07-13 19:39:44,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:44,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905375888] [2021-07-13 19:39:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:44,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:44,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905375888] [2021-07-13 19:39:44,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905375888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:44,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960106342] [2021-07-13 19:39:44,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:44,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:44,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:44,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:44,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:44,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:45,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:39:45,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:39:45,007 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:39:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960106342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:45,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:45,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293501021] [2021-07-13 19:39:45,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:45,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:45,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:45,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:45,067 INFO L87 Difference]: Start difference. First operand 442 states and 1366 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:45,567 INFO L93 Difference]: Finished difference Result 601 states and 1760 transitions. [2021-07-13 19:39:45,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:39:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:45,568 INFO L225 Difference]: With dead ends: 601 [2021-07-13 19:39:45,568 INFO L226 Difference]: Without dead ends: 572 [2021-07-13 19:39:45,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 601.2ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:39:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-07-13 19:39:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 452. [2021-07-13 19:39:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 3.0931263858093128) internal successors, (1395), 451 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1395 transitions. [2021-07-13 19:39:45,573 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1395 transitions. Word has length 19 [2021-07-13 19:39:45,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:45,573 INFO L482 AbstractCegarLoop]: Abstraction has 452 states and 1395 transitions. [2021-07-13 19:39:45,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:45,574 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1395 transitions. [2021-07-13 19:39:45,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:45,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:45,574 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:45,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable758,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,775 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash 146155266, now seen corresponding path program 35 times [2021-07-13 19:39:45,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:45,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840925704] [2021-07-13 19:39:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:45,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840925704] [2021-07-13 19:39:45,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840925704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730113940] [2021-07-13 19:39:45,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:45,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:45,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:45,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:46,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:46,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:46,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:46,143 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:46,146 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:46,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:46,153 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,156 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:46,157 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,159 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:46,160 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:46,163 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:46,167 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:46,172 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:46,225 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:39:46,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:46,226 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:39:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:46,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730113940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:46,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:46,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:46,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991721865] [2021-07-13 19:39:46,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:46,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:46,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:46,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:46,329 INFO L87 Difference]: Start difference. First operand 452 states and 1395 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:46,832 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-07-13 19:39:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:47,144 INFO L93 Difference]: Finished difference Result 667 states and 1932 transitions. [2021-07-13 19:39:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:39:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:47,145 INFO L225 Difference]: With dead ends: 667 [2021-07-13 19:39:47,145 INFO L226 Difference]: Without dead ends: 637 [2021-07-13 19:39:47,145 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:47,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-07-13 19:39:47,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 455. [2021-07-13 19:39:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.0969162995594712) internal successors, (1406), 454 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1406 transitions. [2021-07-13 19:39:47,150 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1406 transitions. Word has length 19 [2021-07-13 19:39:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:47,150 INFO L482 AbstractCegarLoop]: Abstraction has 455 states and 1406 transitions. [2021-07-13 19:39:47,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:47,151 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1406 transitions. [2021-07-13 19:39:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:47,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:47,151 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:47,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable766 [2021-07-13 19:39:47,352 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2000015494, now seen corresponding path program 36 times [2021-07-13 19:39:47,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:47,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957900629] [2021-07-13 19:39:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:47,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:47,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957900629] [2021-07-13 19:39:47,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957900629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830592688] [2021-07-13 19:39:47,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:39:47,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:47,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:47,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:47,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:47,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:47,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:47,762 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:47,766 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:47,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:47,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:47,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:47,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:47,834 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-07-13 19:39:47,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:47,835 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-07-13 19:39:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:47,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830592688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:47,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:47,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:47,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618482902] [2021-07-13 19:39:47,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:47,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:47,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:47,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:47,942 INFO L87 Difference]: Start difference. First operand 455 states and 1406 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:48,933 INFO L93 Difference]: Finished difference Result 788 states and 2213 transitions. [2021-07-13 19:39:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:39:48,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:48,934 INFO L225 Difference]: With dead ends: 788 [2021-07-13 19:39:48,935 INFO L226 Difference]: Without dead ends: 758 [2021-07-13 19:39:48,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1093.5ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:39:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-07-13 19:39:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 458. [2021-07-13 19:39:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.1006564551422318) internal successors, (1417), 457 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1417 transitions. [2021-07-13 19:39:48,941 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1417 transitions. Word has length 19 [2021-07-13 19:39:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:48,941 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1417 transitions. [2021-07-13 19:39:48,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1417 transitions. [2021-07-13 19:39:48,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:48,942 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:48,942 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:49,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,142 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash 801044080, now seen corresponding path program 37 times [2021-07-13 19:39:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:49,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715323204] [2021-07-13 19:39:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:49,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715323204] [2021-07-13 19:39:49,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715323204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042631268] [2021-07-13 19:39:49,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:49,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:49,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:49,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:49,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:49,485 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:49,487 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:49,521 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:39:49,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:49,522 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:39:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:49,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042631268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:49,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:49,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:49,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745858862] [2021-07-13 19:39:49,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:49,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:49,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:49,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:49,591 INFO L87 Difference]: Start difference. First operand 458 states and 1417 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:50,354 INFO L93 Difference]: Finished difference Result 711 states and 2031 transitions. [2021-07-13 19:39:50,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:39:50,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:50,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:50,356 INFO L225 Difference]: With dead ends: 711 [2021-07-13 19:39:50,356 INFO L226 Difference]: Without dead ends: 684 [2021-07-13 19:39:50,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:39:50,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-07-13 19:39:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 458. [2021-07-13 19:39:50,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 3.0940919037199124) internal successors, (1414), 457 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1414 transitions. [2021-07-13 19:39:50,362 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1414 transitions. Word has length 19 [2021-07-13 19:39:50,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:50,362 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 1414 transitions. [2021-07-13 19:39:50,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1414 transitions. [2021-07-13 19:39:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:50,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:50,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:50,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable802,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,563 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1282259270, now seen corresponding path program 38 times [2021-07-13 19:39:50,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:50,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572769575] [2021-07-13 19:39:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:50,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:50,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572769575] [2021-07-13 19:39:50,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572769575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:50,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066857577] [2021-07-13 19:39:50,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:50,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:39:50,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:50,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:50,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:50,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:50,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:50,985 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:50,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:50,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:50,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:50,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:50,997 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:51,000 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:51,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:51,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:51,069 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-07-13 19:39:51,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:51,070 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-07-13 19:39:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:51,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066857577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:51,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:51,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:51,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83287565] [2021-07-13 19:39:51,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:51,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:51,183 INFO L87 Difference]: Start difference. First operand 458 states and 1414 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,374 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2021-07-13 19:39:52,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:52,575 INFO L93 Difference]: Finished difference Result 843 states and 2398 transitions. [2021-07-13 19:39:52,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:39:52,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:52,577 INFO L225 Difference]: With dead ends: 843 [2021-07-13 19:39:52,577 INFO L226 Difference]: Without dead ends: 799 [2021-07-13 19:39:52,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1467.4ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:39:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-07-13 19:39:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 464. [2021-07-13 19:39:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.101511879049676) internal successors, (1436), 463 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1436 transitions. [2021-07-13 19:39:52,583 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1436 transitions. Word has length 19 [2021-07-13 19:39:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:52,584 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1436 transitions. [2021-07-13 19:39:52,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1436 transitions. [2021-07-13 19:39:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:52,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:52,584 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:52,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-07-13 19:39:52,785 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:52,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -454876694, now seen corresponding path program 39 times [2021-07-13 19:39:52,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:52,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541687744] [2021-07-13 19:39:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:52,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:52,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541687744] [2021-07-13 19:39:52,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541687744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:52,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790755812] [2021-07-13 19:39:52,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:53,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:39:53,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:53,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:53,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:53,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:53,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:53,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:53,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:53,244 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:53,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:53,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:53,286 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:39:53,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:53,287 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:39:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790755812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:53,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225074413] [2021-07-13 19:39:53,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:53,346 INFO L87 Difference]: Start difference. First operand 464 states and 1436 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:54,070 INFO L93 Difference]: Finished difference Result 621 states and 1843 transitions. [2021-07-13 19:39:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:39:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:54,072 INFO L225 Difference]: With dead ends: 621 [2021-07-13 19:39:54,072 INFO L226 Difference]: Without dead ends: 606 [2021-07-13 19:39:54,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 861.4ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:39:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-07-13 19:39:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 471. [2021-07-13 19:39:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 3.108510638297872) internal successors, (1461), 470 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1461 transitions. [2021-07-13 19:39:54,077 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1461 transitions. Word has length 19 [2021-07-13 19:39:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:54,077 INFO L482 AbstractCegarLoop]: Abstraction has 471 states and 1461 transitions. [2021-07-13 19:39:54,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1461 transitions. [2021-07-13 19:39:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:54,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:54,078 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:54,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,278 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:54,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1895315012, now seen corresponding path program 40 times [2021-07-13 19:39:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:54,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394609472] [2021-07-13 19:39:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394609472] [2021-07-13 19:39:54,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394609472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23447380] [2021-07-13 19:39:54,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:54,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:39:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:54,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:54,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:54,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:54,720 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:54,724 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:54,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:54,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:54,737 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:54,741 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:54,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:54,750 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,753 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:54,754 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:54,827 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-07-13 19:39:54,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:54,828 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:426, output treesize:67 [2021-07-13 19:39:54,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:54,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23447380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:54,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:54,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920593256] [2021-07-13 19:39:54,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:54,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:54,942 INFO L87 Difference]: Start difference. First operand 471 states and 1461 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:55,854 INFO L93 Difference]: Finished difference Result 692 states and 1995 transitions. [2021-07-13 19:39:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:39:55,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:55,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:55,855 INFO L225 Difference]: With dead ends: 692 [2021-07-13 19:39:55,855 INFO L226 Difference]: Without dead ends: 649 [2021-07-13 19:39:55,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1025.5ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:39:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-07-13 19:39:55,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 474. [2021-07-13 19:39:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-07-13 19:39:55,861 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-07-13 19:39:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:55,861 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-07-13 19:39:55,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-07-13 19:39:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:55,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:55,862 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:56,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable847,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,062 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash 253481524, now seen corresponding path program 41 times [2021-07-13 19:39:56,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:56,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385012443] [2021-07-13 19:39:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385012443] [2021-07-13 19:39:56,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385012443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192665442] [2021-07-13 19:39:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:56,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:39:56,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:56,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:56,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:56,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:56,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:56,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:56,464 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,466 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:56,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:56,471 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:56,475 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:56,480 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:56,485 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:56,490 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:56,493 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:56,555 INFO L628 ElimStorePlain]: treesize reduction 31, result has 65.6 percent of original size [2021-07-13 19:39:56,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:56,556 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:430, output treesize:59 [2021-07-13 19:39:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:56,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192665442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:56,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:56,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:56,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667996671] [2021-07-13 19:39:56,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:56,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:56,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:56,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:56,659 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,767 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-07-13 19:39:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:57,891 INFO L93 Difference]: Finished difference Result 744 states and 2129 transitions. [2021-07-13 19:39:57,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:39:57,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:57,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:57,892 INFO L225 Difference]: With dead ends: 744 [2021-07-13 19:39:57,892 INFO L226 Difference]: Without dead ends: 701 [2021-07-13 19:39:57,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1246.0ms TimeCoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:39:57,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-07-13 19:39:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 474. [2021-07-13 19:39:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.105708245243129) internal successors, (1469), 473 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1469 transitions. [2021-07-13 19:39:57,898 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1469 transitions. Word has length 19 [2021-07-13 19:39:57,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:57,899 INFO L482 AbstractCegarLoop]: Abstraction has 474 states and 1469 transitions. [2021-07-13 19:39:57,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:57,899 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1469 transitions. [2021-07-13 19:39:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:57,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:57,899 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:58,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-07-13 19:39:58,104 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1363700404, now seen corresponding path program 42 times [2021-07-13 19:39:58,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:58,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526283659] [2021-07-13 19:39:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:58,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526283659] [2021-07-13 19:39:58,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526283659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745455899] [2021-07-13 19:39:58,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:58,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:39:58,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:39:58,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:39:58,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:58,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:58,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:39:58,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:39:58,493 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:39:58,496 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:58,529 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:39:58,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:58,530 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:39:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:58,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745455899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:58,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:39:58,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:39:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026257547] [2021-07-13 19:39:58,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:39:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:39:58,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:39:58,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:39:58,586 INFO L87 Difference]: Start difference. First operand 474 states and 1469 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:39:59,268 INFO L93 Difference]: Finished difference Result 646 states and 1910 transitions. [2021-07-13 19:39:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:39:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:39:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:39:59,269 INFO L225 Difference]: With dead ends: 646 [2021-07-13 19:39:59,269 INFO L226 Difference]: Without dead ends: 617 [2021-07-13 19:39:59,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:39:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-07-13 19:39:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 480. [2021-07-13 19:39:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 3.11482254697286) internal successors, (1492), 479 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1492 transitions. [2021-07-13 19:39:59,275 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1492 transitions. Word has length 19 [2021-07-13 19:39:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:39:59,275 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1492 transitions. [2021-07-13 19:39:59,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:39:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1492 transitions. [2021-07-13 19:39:59,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:39:59,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:39:59,276 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:39:59,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable881 [2021-07-13 19:39:59,476 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:39:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:39:59,476 INFO L82 PathProgramCache]: Analyzing trace with hash -76737914, now seen corresponding path program 43 times [2021-07-13 19:39:59,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:39:59,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656291110] [2021-07-13 19:39:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:39:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:39:59,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:39:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656291110] [2021-07-13 19:39:59,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656291110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:39:59,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280933048] [2021-07-13 19:39:59,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:39:59,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:39:59,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:39:59,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:59,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:39:59,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:39:59,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,876 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:39:59,877 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:59,884 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:59,888 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:39:59,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:59,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:39:59,898 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:39:59,964 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-07-13 19:39:59,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:39:59,965 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:40:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:00,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280933048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:00,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:00,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:00,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461802018] [2021-07-13 19:40:00,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:00,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:00,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:00,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:00,075 INFO L87 Difference]: Start difference. First operand 480 states and 1492 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:00,881 INFO L93 Difference]: Finished difference Result 694 states and 1999 transitions. [2021-07-13 19:40:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:00,882 INFO L225 Difference]: With dead ends: 694 [2021-07-13 19:40:00,883 INFO L226 Difference]: Without dead ends: 644 [2021-07-13 19:40:00,883 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-13 19:40:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 477. [2021-07-13 19:40:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-07-13 19:40:00,888 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-07-13 19:40:00,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:00,888 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-07-13 19:40:00,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:00,888 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-07-13 19:40:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:00,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:00,889 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-07-13 19:40:01,090 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1748500812, now seen corresponding path program 44 times [2021-07-13 19:40:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986541977] [2021-07-13 19:40:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986541977] [2021-07-13 19:40:01,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986541977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15455874] [2021-07-13 19:40:01,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:01,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:01,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:01,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:01,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:01,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:01,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:01,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:01,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:01,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:01,535 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:01,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:01,542 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:01,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:01,550 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:01,646 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-07-13 19:40:01,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:40:01,648 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-07-13 19:40:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15455874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748259032] [2021-07-13 19:40:01,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:01,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:01,785 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,297 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:40:02,555 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-13 19:40:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:02,826 INFO L93 Difference]: Finished difference Result 653 states and 1948 transitions. [2021-07-13 19:40:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:02,827 INFO L225 Difference]: With dead ends: 653 [2021-07-13 19:40:02,827 INFO L226 Difference]: Without dead ends: 638 [2021-07-13 19:40:02,827 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1084.2ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-07-13 19:40:02,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 477. [2021-07-13 19:40:02,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 3.1176470588235294) internal successors, (1484), 476 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1484 transitions. [2021-07-13 19:40:02,834 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1484 transitions. Word has length 19 [2021-07-13 19:40:02,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:02,834 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1484 transitions. [2021-07-13 19:40:02,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:02,834 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1484 transitions. [2021-07-13 19:40:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:02,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:02,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:03,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,036 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash -169123340, now seen corresponding path program 45 times [2021-07-13 19:40:03,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:03,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102724918] [2021-07-13 19:40:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:03,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102724918] [2021-07-13 19:40:03,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102724918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8891119] [2021-07-13 19:40:03,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:03,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:03,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:03,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:03,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:03,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:03,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:03,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,421 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:03,428 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:03,433 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,438 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:03,443 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:03,453 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,459 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:03,464 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,470 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,476 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:03,482 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,486 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:03,487 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:03,492 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:03,498 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:03,510 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:03,515 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:03,519 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:03,698 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:40:03,698 INFO L628 ElimStorePlain]: treesize reduction 212, result has 45.8 percent of original size [2021-07-13 19:40:03,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:03,700 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:179 [2021-07-13 19:40:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:03,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8891119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:03,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:03,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:03,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585631924] [2021-07-13 19:40:03,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:03,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:03,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:03,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:03,916 INFO L87 Difference]: Start difference. First operand 477 states and 1484 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,468 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-13 19:40:04,593 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2021-07-13 19:40:04,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:04,732 INFO L93 Difference]: Finished difference Result 696 states and 2047 transitions. [2021-07-13 19:40:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:04,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:04,733 INFO L225 Difference]: With dead ends: 696 [2021-07-13 19:40:04,733 INFO L226 Difference]: Without dead ends: 681 [2021-07-13 19:40:04,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:04,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-07-13 19:40:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 482. [2021-07-13 19:40:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 3.135135135135135) internal successors, (1508), 481 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1508 transitions. [2021-07-13 19:40:04,740 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1508 transitions. Word has length 19 [2021-07-13 19:40:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 482 states and 1508 transitions. [2021-07-13 19:40:04,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1508 transitions. [2021-07-13 19:40:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:04,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:04,741 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:04,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:04,956 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:04,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:04,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1123219060, now seen corresponding path program 46 times [2021-07-13 19:40:04,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:04,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772598846] [2021-07-13 19:40:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:05,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:05,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772598846] [2021-07-13 19:40:05,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772598846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:05,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088214186] [2021-07-13 19:40:05,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:05,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:05,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:05,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:05,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:05,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:05,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,422 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:05,427 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,432 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:05,436 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:05,441 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,446 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:05,452 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:05,457 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:05,466 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,471 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:05,476 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:05,481 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:05,485 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:05,490 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:05,721 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-07-13 19:40:05,722 INFO L628 ElimStorePlain]: treesize reduction 76, result has 74.5 percent of original size [2021-07-13 19:40:05,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:40:05,725 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-07-13 19:40:05,855 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:40:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:06,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088214186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:06,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:06,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:06,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031125665] [2021-07-13 19:40:06,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:06,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:06,055 INFO L87 Difference]: Start difference. First operand 482 states and 1508 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:06,717 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-07-13 19:40:06,992 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-07-13 19:40:07,269 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-07-13 19:40:07,415 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-07-13 19:40:07,666 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 19:40:07,921 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-07-13 19:40:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:08,040 INFO L93 Difference]: Finished difference Result 686 states and 2025 transitions. [2021-07-13 19:40:08,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:40:08,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:08,041 INFO L225 Difference]: With dead ends: 686 [2021-07-13 19:40:08,041 INFO L226 Difference]: Without dead ends: 664 [2021-07-13 19:40:08,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 2271.5ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-07-13 19:40:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 478. [2021-07-13 19:40:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-07-13 19:40:08,047 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-07-13 19:40:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:08,048 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-07-13 19:40:08,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-07-13 19:40:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:08,048 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:08,048 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:08,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,249 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1684500614, now seen corresponding path program 47 times [2021-07-13 19:40:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:08,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296952994] [2021-07-13 19:40:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296952994] [2021-07-13 19:40:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296952994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148334536] [2021-07-13 19:40:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:08,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:08,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:08,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:08,642 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:08,646 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:08,649 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:08,653 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:08,656 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,658 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:08,659 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:08,662 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:08,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:08,669 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:08,672 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:08,730 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:40:08,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:08,730 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:40:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:08,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148334536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:08,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:08,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565358602] [2021-07-13 19:40:08,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:08,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:08,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:08,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:08,867 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:09,804 INFO L93 Difference]: Finished difference Result 706 states and 2077 transitions. [2021-07-13 19:40:09,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:09,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:09,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:09,805 INFO L225 Difference]: With dead ends: 706 [2021-07-13 19:40:09,805 INFO L226 Difference]: Without dead ends: 676 [2021-07-13 19:40:09,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 973.0ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:09,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-07-13 19:40:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 481. [2021-07-13 19:40:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.1354166666666665) internal successors, (1505), 480 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1505 transitions. [2021-07-13 19:40:09,811 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1505 transitions. Word has length 19 [2021-07-13 19:40:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:09,811 INFO L482 AbstractCegarLoop]: Abstraction has 481 states and 1505 transitions. [2021-07-13 19:40:09,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1505 transitions. [2021-07-13 19:40:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:09,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:09,812 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:10,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-13 19:40:10,013 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:10,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1859066244, now seen corresponding path program 48 times [2021-07-13 19:40:10,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:10,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24606519] [2021-07-13 19:40:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24606519] [2021-07-13 19:40:10,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24606519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019257969] [2021-07-13 19:40:10,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:10,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:10,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:10,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:10,438 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:10,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:10,446 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:10,450 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:10,454 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:10,458 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:10,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:10,467 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:10,470 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:10,475 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:10,479 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:10,483 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:10,487 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:10,492 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:10,495 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:10,660 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:40:10,660 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-07-13 19:40:10,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:10,662 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-07-13 19:40:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:10,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019257969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:10,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:10,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:10,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472204839] [2021-07-13 19:40:10,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:10,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:10,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:10,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:10,875 INFO L87 Difference]: Start difference. First operand 481 states and 1505 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,436 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:40:11,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:11,669 INFO L93 Difference]: Finished difference Result 682 states and 2026 transitions. [2021-07-13 19:40:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:11,671 INFO L225 Difference]: With dead ends: 682 [2021-07-13 19:40:11,671 INFO L226 Difference]: Without dead ends: 667 [2021-07-13 19:40:11,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 995.1ms TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-07-13 19:40:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 484. [2021-07-13 19:40:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.1469979296066253) internal successors, (1520), 483 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1520 transitions. [2021-07-13 19:40:11,676 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1520 transitions. Word has length 19 [2021-07-13 19:40:11,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:11,676 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1520 transitions. [2021-07-13 19:40:11,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1520 transitions. [2021-07-13 19:40:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:11,677 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:11,677 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:11,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable983 [2021-07-13 19:40:11,878 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:11,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:11,878 INFO L82 PathProgramCache]: Analyzing trace with hash -566723844, now seen corresponding path program 49 times [2021-07-13 19:40:11,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:11,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434033301] [2021-07-13 19:40:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:11,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:12,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434033301] [2021-07-13 19:40:12,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434033301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908747137] [2021-07-13 19:40:12,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:12,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:12,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:12,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:12,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:12,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:12,220 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:12,224 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:12,230 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:12,234 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:12,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:12,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:12,246 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:12,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:12,254 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:12,258 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:12,264 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:12,274 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:12,277 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:12,281 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:12,440 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:40:12,440 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:40:12,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:12,442 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:40:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:12,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908747137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:12,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:12,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:12,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994538179] [2021-07-13 19:40:12,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:12,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:12,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:12,698 INFO L87 Difference]: Start difference. First operand 484 states and 1520 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,287 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2021-07-13 19:40:13,443 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-07-13 19:40:13,605 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-07-13 19:40:13,732 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-07-13 19:40:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:13,779 INFO L93 Difference]: Finished difference Result 690 states and 2041 transitions. [2021-07-13 19:40:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:13,781 INFO L225 Difference]: With dead ends: 690 [2021-07-13 19:40:13,781 INFO L226 Difference]: Without dead ends: 675 [2021-07-13 19:40:13,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1249.9ms TimeCoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:13,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-07-13 19:40:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 483. [2021-07-13 19:40:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 3.141078838174274) internal successors, (1514), 482 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1514 transitions. [2021-07-13 19:40:13,788 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1514 transitions. Word has length 19 [2021-07-13 19:40:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:13,788 INFO L482 AbstractCegarLoop]: Abstraction has 483 states and 1514 transitions. [2021-07-13 19:40:13,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1514 transitions. [2021-07-13 19:40:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:13,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:13,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:13,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-07-13 19:40:13,991 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash 541213654, now seen corresponding path program 50 times [2021-07-13 19:40:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:13,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576316783] [2021-07-13 19:40:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:14,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:14,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576316783] [2021-07-13 19:40:14,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576316783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905375605] [2021-07-13 19:40:14,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:14,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:14,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:14,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:14,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:14,477 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:14,480 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:14,484 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:14,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:14,491 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:14,495 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:14,498 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:14,501 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:14,507 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:14,510 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:14,596 INFO L628 ElimStorePlain]: treesize reduction 67, result has 58.9 percent of original size [2021-07-13 19:40:14,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:40:14,597 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:332, output treesize:96 [2021-07-13 19:40:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905375605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:14,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:14,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846064831] [2021-07-13 19:40:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:14,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:14,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:14,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:14,725 INFO L87 Difference]: Start difference. First operand 483 states and 1514 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,321 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 19:40:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:15,852 INFO L93 Difference]: Finished difference Result 659 states and 1970 transitions. [2021-07-13 19:40:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:15,854 INFO L225 Difference]: With dead ends: 659 [2021-07-13 19:40:15,854 INFO L226 Difference]: Without dead ends: 644 [2021-07-13 19:40:15,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1177.1ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:15,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-07-13 19:40:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 478. [2021-07-13 19:40:15,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 3.1236897274633124) internal successors, (1490), 477 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1490 transitions. [2021-07-13 19:40:15,859 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1490 transitions. Word has length 19 [2021-07-13 19:40:15,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:15,860 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1490 transitions. [2021-07-13 19:40:15,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:15,860 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1490 transitions. [2021-07-13 19:40:15,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:15,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:15,861 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:16,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1024 [2021-07-13 19:40:16,081 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1600789196, now seen corresponding path program 51 times [2021-07-13 19:40:16,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:16,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998220457] [2021-07-13 19:40:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998220457] [2021-07-13 19:40:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998220457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640684654] [2021-07-13 19:40:16,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:16,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:40:16,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:16,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:16,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:16,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:16,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:16,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:16,527 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:16,530 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:16,534 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:16,538 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:16,541 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:16,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:16,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:16,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:16,628 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-07-13 19:40:16,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:16,629 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:40:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640684654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:16,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:16,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:16,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150706682] [2021-07-13 19:40:16,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:16,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:16,759 INFO L87 Difference]: Start difference. First operand 478 states and 1490 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:17,519 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 19:40:17,868 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2021-07-13 19:40:18,032 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2021-07-13 19:40:18,168 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-07-13 19:40:18,313 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-07-13 19:40:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:18,336 INFO L93 Difference]: Finished difference Result 841 states and 2433 transitions. [2021-07-13 19:40:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:18,337 INFO L225 Difference]: With dead ends: 841 [2021-07-13 19:40:18,337 INFO L226 Difference]: Without dead ends: 792 [2021-07-13 19:40:18,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1696.4ms TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:40:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-07-13 19:40:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 490. [2021-07-13 19:40:18,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-07-13 19:40:18,344 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-07-13 19:40:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:18,344 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-07-13 19:40:18,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:18,344 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-07-13 19:40:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:18,345 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:18,345 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:18,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,545 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:18,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:18,546 INFO L82 PathProgramCache]: Analyzing trace with hash 411566906, now seen corresponding path program 52 times [2021-07-13 19:40:18,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:18,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726338583] [2021-07-13 19:40:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:18,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726338583] [2021-07-13 19:40:18,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726338583] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:18,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619500576] [2021-07-13 19:40:18,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:18,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:19,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:19,005 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:19,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:19,014 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:19,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:19,022 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:19,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:19,029 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:19,033 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:19,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:19,040 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:19,098 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:40:19,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:19,100 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:40:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:19,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619500576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:19,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:19,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:19,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015598965] [2021-07-13 19:40:19,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:19,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:19,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:19,214 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:19,824 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 19:40:19,948 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-07-13 19:40:20,095 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-13 19:40:20,272 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-13 19:40:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:20,305 INFO L93 Difference]: Finished difference Result 795 states and 2337 transitions. [2021-07-13 19:40:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:20,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:20,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:20,307 INFO L225 Difference]: With dead ends: 795 [2021-07-13 19:40:20,307 INFO L226 Difference]: Without dead ends: 765 [2021-07-13 19:40:20,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1191.1ms TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-07-13 19:40:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 493. [2021-07-13 19:40:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.144308943089431) internal successors, (1547), 492 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1547 transitions. [2021-07-13 19:40:20,314 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1547 transitions. Word has length 19 [2021-07-13 19:40:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:20,314 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1547 transitions. [2021-07-13 19:40:20,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1547 transitions. [2021-07-13 19:40:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:20,315 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:20,315 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:20,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,526 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:20,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1162967344, now seen corresponding path program 53 times [2021-07-13 19:40:20,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:20,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542615695] [2021-07-13 19:40:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:20,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:20,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542615695] [2021-07-13 19:40:20,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542615695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:20,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549332313] [2021-07-13 19:40:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:20,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:20,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:20,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:20,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:20,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:20,911 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:20,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:20,921 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,925 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:20,930 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:20,934 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:20,939 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,944 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,948 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,952 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:20,956 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,960 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:20,960 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:20,965 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,968 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:20,969 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:20,973 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:20,977 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:20,981 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:20,985 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:20,989 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:20,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:20,993 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:21,168 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:40:21,168 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-07-13 19:40:21,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:21,170 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-07-13 19:40:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:21,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549332313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:21,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:21,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149039161] [2021-07-13 19:40:21,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:21,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:21,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:21,381 INFO L87 Difference]: Start difference. First operand 493 states and 1547 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,027 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-07-13 19:40:22,177 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2021-07-13 19:40:22,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:22,356 INFO L93 Difference]: Finished difference Result 784 states and 2326 transitions. [2021-07-13 19:40:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:22,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:22,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:22,358 INFO L225 Difference]: With dead ends: 784 [2021-07-13 19:40:22,358 INFO L226 Difference]: Without dead ends: 769 [2021-07-13 19:40:22,358 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1124.5ms TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-13 19:40:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 498. [2021-07-13 19:40:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 3.160965794768612) internal successors, (1571), 497 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1571 transitions. [2021-07-13 19:40:22,366 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1571 transitions. Word has length 19 [2021-07-13 19:40:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:22,366 INFO L482 AbstractCegarLoop]: Abstraction has 498 states and 1571 transitions. [2021-07-13 19:40:22,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1571 transitions. [2021-07-13 19:40:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:22,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:22,367 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:22,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-07-13 19:40:22,569 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1839657552, now seen corresponding path program 54 times [2021-07-13 19:40:22,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:22,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180325881] [2021-07-13 19:40:22,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:22,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:22,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180325881] [2021-07-13 19:40:22,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180325881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:22,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161684395] [2021-07-13 19:40:22,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:22,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:22,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:22,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:22,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:22,968 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:22,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:22,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:22,980 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:22,985 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:22,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:22,993 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:22,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:22,997 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:23,001 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:23,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:23,009 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:23,014 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:23,026 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:23,030 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:23,034 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:23,199 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:40:23,199 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-07-13 19:40:23,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:23,214 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-07-13 19:40:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:23,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161684395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:23,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:23,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:23,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810882480] [2021-07-13 19:40:23,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:23,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:23,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:23,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:23,504 INFO L87 Difference]: Start difference. First operand 498 states and 1571 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,080 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-07-13 19:40:24,390 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-07-13 19:40:24,636 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-07-13 19:40:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:24,658 INFO L93 Difference]: Finished difference Result 776 states and 2291 transitions. [2021-07-13 19:40:24,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:24,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:24,659 INFO L225 Difference]: With dead ends: 776 [2021-07-13 19:40:24,659 INFO L226 Difference]: Without dead ends: 761 [2021-07-13 19:40:24,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1440.3ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-07-13 19:40:24,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 495. [2021-07-13 19:40:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.1497975708502026) internal successors, (1556), 494 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1556 transitions. [2021-07-13 19:40:24,666 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1556 transitions. Word has length 19 [2021-07-13 19:40:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:24,666 INFO L482 AbstractCegarLoop]: Abstraction has 495 states and 1556 transitions. [2021-07-13 19:40:24,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1556 transitions. [2021-07-13 19:40:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:24,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:24,667 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:24,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:24,867 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:24,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1233511390, now seen corresponding path program 55 times [2021-07-13 19:40:24,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:24,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115501885] [2021-07-13 19:40:24,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:25,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115501885] [2021-07-13 19:40:25,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115501885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339093224] [2021-07-13 19:40:25,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:25,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,340 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:25,348 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:25,351 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:25,355 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:25,358 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:25,362 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:25,365 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:25,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:25,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,375 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:25,378 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:25,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:25,465 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-07-13 19:40:25,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:40:25,466 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:369, output treesize:96 [2021-07-13 19:40:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:25,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339093224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:25,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:25,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:25,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982739550] [2021-07-13 19:40:25,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:25,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:25,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:25,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:25,603 INFO L87 Difference]: Start difference. First operand 495 states and 1556 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,145 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 19:40:26,295 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-07-13 19:40:26,480 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-13 19:40:26,655 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2021-07-13 19:40:26,802 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-07-13 19:40:26,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:26,845 INFO L93 Difference]: Finished difference Result 776 states and 2307 transitions. [2021-07-13 19:40:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:26,846 INFO L225 Difference]: With dead ends: 776 [2021-07-13 19:40:26,846 INFO L226 Difference]: Without dead ends: 761 [2021-07-13 19:40:26,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1381.2ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-07-13 19:40:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 490. [2021-07-13 19:40:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-07-13 19:40:26,852 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-07-13 19:40:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:26,852 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-07-13 19:40:26,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-07-13 19:40:26,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:26,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:26,853 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:27,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-07-13 19:40:27,054 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1833437172, now seen corresponding path program 56 times [2021-07-13 19:40:27,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:27,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974818745] [2021-07-13 19:40:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974818745] [2021-07-13 19:40:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974818745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345533142] [2021-07-13 19:40:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:27,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:27,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:27,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:27,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:27,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:27,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:27,401 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:27,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:27,439 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:40:27,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:27,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:40:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345533142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:27,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:27,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083718192] [2021-07-13 19:40:27,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:27,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:27,496 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:28,449 INFO L93 Difference]: Finished difference Result 730 states and 2163 transitions. [2021-07-13 19:40:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:28,450 INFO L225 Difference]: With dead ends: 730 [2021-07-13 19:40:28,450 INFO L226 Difference]: Without dead ends: 683 [2021-07-13 19:40:28,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 991.4ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-07-13 19:40:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 490. [2021-07-13 19:40:28,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 3.132924335378323) internal successors, (1532), 489 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1532 transitions. [2021-07-13 19:40:28,456 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1532 transitions. Word has length 19 [2021-07-13 19:40:28,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:28,456 INFO L482 AbstractCegarLoop]: Abstraction has 490 states and 1532 transitions. [2021-07-13 19:40:28,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:28,456 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1532 transitions. [2021-07-13 19:40:28,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:28,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:28,457 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:28,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-07-13 19:40:28,658 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash -903319062, now seen corresponding path program 57 times [2021-07-13 19:40:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:28,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069665530] [2021-07-13 19:40:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:28,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:28,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069665530] [2021-07-13 19:40:28,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069665530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:28,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6547748] [2021-07-13 19:40:28,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:28,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:28,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:29,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:29,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:29,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:29,022 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:29,025 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:29,029 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:29,032 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:29,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:29,039 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:29,043 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:29,082 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-07-13 19:40:29,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:29,083 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-07-13 19:40:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:29,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6547748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:29,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:29,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:29,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667537195] [2021-07-13 19:40:29,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:29,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:29,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:29,138 INFO L87 Difference]: Start difference. First operand 490 states and 1532 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:29,687 INFO L93 Difference]: Finished difference Result 714 states and 2115 transitions. [2021-07-13 19:40:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:40:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:29,688 INFO L225 Difference]: With dead ends: 714 [2021-07-13 19:40:29,688 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 19:40:29,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 544.4ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 19:40:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 493. [2021-07-13 19:40:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-07-13 19:40:29,694 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-07-13 19:40:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:29,694 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-07-13 19:40:29,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:29,695 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-07-13 19:40:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:29,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:29,695 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:29,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-07-13 19:40:29,896 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:29,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:29,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1951209916, now seen corresponding path program 58 times [2021-07-13 19:40:29,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:29,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229730657] [2021-07-13 19:40:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:30,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229730657] [2021-07-13 19:40:30,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229730657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030559872] [2021-07-13 19:40:30,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:30,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:30,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:30,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:30,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:30,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:30,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:30,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:30,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:30,207 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:30,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:30,214 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:30,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:30,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:30,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:30,229 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:30,233 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:30,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:30,307 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-07-13 19:40:30,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:30,308 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:40:30,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:30,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030559872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:30,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:30,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:30,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709833437] [2021-07-13 19:40:30,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:30,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:30,424 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:31,016 INFO L93 Difference]: Finished difference Result 738 states and 2163 transitions. [2021-07-13 19:40:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:31,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:31,017 INFO L225 Difference]: With dead ends: 738 [2021-07-13 19:40:31,017 INFO L226 Difference]: Without dead ends: 688 [2021-07-13 19:40:31,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:40:31,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-13 19:40:31,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 493. [2021-07-13 19:40:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.130081300813008) internal successors, (1540), 492 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1540 transitions. [2021-07-13 19:40:31,023 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1540 transitions. Word has length 19 [2021-07-13 19:40:31,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:31,023 INFO L482 AbstractCegarLoop]: Abstraction has 493 states and 1540 transitions. [2021-07-13 19:40:31,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:31,023 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1540 transitions. [2021-07-13 19:40:31,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:31,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:31,024 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:31,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1159,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,224 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -194960844, now seen corresponding path program 59 times [2021-07-13 19:40:31,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:31,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568378134] [2021-07-13 19:40:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568378134] [2021-07-13 19:40:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568378134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627790740] [2021-07-13 19:40:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:31,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:40:31,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:31,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:31,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:31,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-07-13 19:40:31,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:31,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:31,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:31,540 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:31,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:31,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:31,551 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:31,617 INFO L628 ElimStorePlain]: treesize reduction 79, result has 42.8 percent of original size [2021-07-13 19:40:31,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:31,618 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:307, output treesize:59 [2021-07-13 19:40:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:31,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627790740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:31,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:31,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:40:31,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733013079] [2021-07-13 19:40:31,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:40:31,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:31,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:40:31,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:40:31,712 INFO L87 Difference]: Start difference. First operand 493 states and 1540 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:32,235 INFO L93 Difference]: Finished difference Result 705 states and 2093 transitions. [2021-07-13 19:40:32,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:32,236 INFO L225 Difference]: With dead ends: 705 [2021-07-13 19:40:32,236 INFO L226 Difference]: Without dead ends: 655 [2021-07-13 19:40:32,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 594.8ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:40:32,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-07-13 19:40:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 496. [2021-07-13 19:40:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1333333333333333) internal successors, (1551), 495 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1551 transitions. [2021-07-13 19:40:32,242 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1551 transitions. Word has length 19 [2021-07-13 19:40:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:32,242 INFO L482 AbstractCegarLoop]: Abstraction has 496 states and 1551 transitions. [2021-07-13 19:40:32,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1551 transitions. [2021-07-13 19:40:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:32,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:32,243 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:32,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,445 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1920214934, now seen corresponding path program 60 times [2021-07-13 19:40:32,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:32,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146000179] [2021-07-13 19:40:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146000179] [2021-07-13 19:40:32,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146000179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709939367] [2021-07-13 19:40:32,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:32,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:40:32,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:32,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:32,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:32,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:32,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:32,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:32,849 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:32,852 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:32,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:32,894 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:40:32,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:32,895 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:40:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:32,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709939367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:32,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:32,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:32,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080749267] [2021-07-13 19:40:32,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:32,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:32,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:32,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:32,953 INFO L87 Difference]: Start difference. First operand 496 states and 1551 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:33,643 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2021-07-13 19:40:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:34,220 INFO L93 Difference]: Finished difference Result 975 states and 2783 transitions. [2021-07-13 19:40:34,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:34,221 INFO L225 Difference]: With dead ends: 975 [2021-07-13 19:40:34,221 INFO L226 Difference]: Without dead ends: 913 [2021-07-13 19:40:34,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1289.3ms TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2021-07-13 19:40:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 502. [2021-07-13 19:40:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-07-13 19:40:34,229 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-07-13 19:40:34,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:34,229 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-07-13 19:40:34,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-07-13 19:40:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:34,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:34,229 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:34,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:34,430 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:34,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1459737962, now seen corresponding path program 61 times [2021-07-13 19:40:34,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:34,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225430415] [2021-07-13 19:40:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225430415] [2021-07-13 19:40:34,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225430415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681117703] [2021-07-13 19:40:34,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:34,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:34,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:34,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:34,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:34,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:34,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:40:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:34,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681117703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:34,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:34,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:34,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818807444] [2021-07-13 19:40:34,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:34,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:34,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:34,927 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,204 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:40:35,400 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-07-13 19:40:35,612 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 19:40:35,745 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 40 [2021-07-13 19:40:35,967 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-13 19:40:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:35,986 INFO L93 Difference]: Finished difference Result 843 states and 2462 transitions. [2021-07-13 19:40:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:35,987 INFO L225 Difference]: With dead ends: 843 [2021-07-13 19:40:35,987 INFO L226 Difference]: Without dead ends: 814 [2021-07-13 19:40:35,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1168.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-07-13 19:40:35,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 502. [2021-07-13 19:40:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.143712574850299) internal successors, (1575), 501 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1575 transitions. [2021-07-13 19:40:35,994 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1575 transitions. Word has length 19 [2021-07-13 19:40:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:35,994 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1575 transitions. [2021-07-13 19:40:35,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1575 transitions. [2021-07-13 19:40:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:35,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:35,995 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:36,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1204,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,196 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:36,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash 692891814, now seen corresponding path program 62 times [2021-07-13 19:40:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:36,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434466763] [2021-07-13 19:40:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434466763] [2021-07-13 19:40:36,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434466763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703004962] [2021-07-13 19:40:36,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:36,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:36,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:36,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:36,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:36,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:36,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:36,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:36,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:36,602 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:36,606 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:36,609 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:36,612 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:36,616 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:36,619 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:36,623 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:36,626 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:36,712 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-07-13 19:40:36,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:40:36,713 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-07-13 19:40:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703004962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:36,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:36,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545539334] [2021-07-13 19:40:36,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:36,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:36,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:36,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:36,839 INFO L87 Difference]: Start difference. First operand 502 states and 1575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:37,512 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-07-13 19:40:37,688 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 19:40:37,925 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 19:40:38,054 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-07-13 19:40:38,262 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 19:40:38,429 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-07-13 19:40:38,630 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-07-13 19:40:38,791 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-13 19:40:38,950 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 19:40:39,090 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2021-07-13 19:40:39,292 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-13 19:40:39,577 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-07-13 19:40:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:39,590 INFO L93 Difference]: Finished difference Result 990 states and 2847 transitions. [2021-07-13 19:40:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:40:39,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:39,591 INFO L225 Difference]: With dead ends: 990 [2021-07-13 19:40:39,592 INFO L226 Difference]: Without dead ends: 946 [2021-07-13 19:40:39,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 2714.4ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:40:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-07-13 19:40:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 501. [2021-07-13 19:40:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-07-13 19:40:39,599 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-07-13 19:40:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:39,599 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-07-13 19:40:39,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-07-13 19:40:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:39,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:39,600 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:39,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:39,801 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 168702634, now seen corresponding path program 63 times [2021-07-13 19:40:39,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:39,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207416556] [2021-07-13 19:40:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:39,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:39,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207416556] [2021-07-13 19:40:39,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207416556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:39,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192429779] [2021-07-13 19:40:39,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:40,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:40,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:40,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:40,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:40,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:40,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:40,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:40,213 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:40,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:40,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:40,254 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-07-13 19:40:40,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:40,255 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-07-13 19:40:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:40,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192429779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:40,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:40,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:40,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232668797] [2021-07-13 19:40:40,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:40,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:40,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:40,314 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,031 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 19:40:41,147 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-07-13 19:40:41,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:41,194 INFO L93 Difference]: Finished difference Result 879 states and 2585 transitions. [2021-07-13 19:40:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:40:41,194 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:41,195 INFO L225 Difference]: With dead ends: 879 [2021-07-13 19:40:41,195 INFO L226 Difference]: Without dead ends: 850 [2021-07-13 19:40:41,196 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 937.0ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-07-13 19:40:41,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 501. [2021-07-13 19:40:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 3.152) internal successors, (1576), 500 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1576 transitions. [2021-07-13 19:40:41,202 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1576 transitions. Word has length 19 [2021-07-13 19:40:41,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:41,203 INFO L482 AbstractCegarLoop]: Abstraction has 501 states and 1576 transitions. [2021-07-13 19:40:41,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1576 transitions. [2021-07-13 19:40:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:41,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:41,203 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:41,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-07-13 19:40:41,404 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:41,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2074185700, now seen corresponding path program 64 times [2021-07-13 19:40:41,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:41,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621407125] [2021-07-13 19:40:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:41,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621407125] [2021-07-13 19:40:41,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621407125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894618475] [2021-07-13 19:40:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:41,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:41,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:41,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:41,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:41,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:41,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:41,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:41,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:41,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:41,764 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:40:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:41,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894618475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:41,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:41,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:41,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078349] [2021-07-13 19:40:41,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:41,819 INFO L87 Difference]: Start difference. First operand 501 states and 1576 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:42,383 INFO L93 Difference]: Finished difference Result 766 states and 2250 transitions. [2021-07-13 19:40:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:40:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:42,384 INFO L225 Difference]: With dead ends: 766 [2021-07-13 19:40:42,384 INFO L226 Difference]: Without dead ends: 737 [2021-07-13 19:40:42,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-07-13 19:40:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 505. [2021-07-13 19:40:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-07-13 19:40:42,391 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-07-13 19:40:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:42,391 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-07-13 19:40:42,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-07-13 19:40:42,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:42,391 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:42,391 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:42,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-07-13 19:40:42,592 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:42,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 780343278, now seen corresponding path program 65 times [2021-07-13 19:40:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:42,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127007459] [2021-07-13 19:40:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:42,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:42,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127007459] [2021-07-13 19:40:42,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127007459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:42,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749958034] [2021-07-13 19:40:42,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:42,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:42,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:42,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:42,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:42,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:42,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:42,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:42,931 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:42,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:42,938 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:42,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:42,944 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:42,947 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:42,951 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:42,954 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:43,007 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:40:43,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:43,008 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:40:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749958034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:43,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:43,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:43,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101685250] [2021-07-13 19:40:43,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:43,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:43,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:43,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:43,110 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:43,787 INFO L93 Difference]: Finished difference Result 799 states and 2337 transitions. [2021-07-13 19:40:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:40:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:43,789 INFO L225 Difference]: With dead ends: 799 [2021-07-13 19:40:43,789 INFO L226 Difference]: Without dead ends: 755 [2021-07-13 19:40:43,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:40:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-07-13 19:40:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 505. [2021-07-13 19:40:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.1547619047619047) internal successors, (1590), 504 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1590 transitions. [2021-07-13 19:40:43,796 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1590 transitions. Word has length 19 [2021-07-13 19:40:43,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:43,796 INFO L482 AbstractCegarLoop]: Abstraction has 505 states and 1590 transitions. [2021-07-13 19:40:43,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:43,796 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1590 transitions. [2021-07-13 19:40:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:43,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:43,797 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:43,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-07-13 19:40:43,997 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:43,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:43,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1365827482, now seen corresponding path program 66 times [2021-07-13 19:40:43,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:43,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485371704] [2021-07-13 19:40:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:44,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485371704] [2021-07-13 19:40:44,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485371704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098316746] [2021-07-13 19:40:44,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:44,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:44,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:44,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:44,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:44,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:44,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:44,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,338 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:44,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:44,342 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,345 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:44,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:44,348 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:44,352 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:44,355 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:44,358 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:44,415 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-07-13 19:40:44,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:44,416 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:40:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:44,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098316746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:44,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:44,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:40:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466005338] [2021-07-13 19:40:44,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:40:44,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:40:44,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:44,515 INFO L87 Difference]: Start difference. First operand 505 states and 1590 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:45,065 INFO L93 Difference]: Finished difference Result 700 states and 2119 transitions. [2021-07-13 19:40:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:45,066 INFO L225 Difference]: With dead ends: 700 [2021-07-13 19:40:45,066 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 19:40:45,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:40:45,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 19:40:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 508. [2021-07-13 19:40:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 3.157790927021696) internal successors, (1601), 507 states have internal predecessors, (1601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1601 transitions. [2021-07-13 19:40:45,073 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1601 transitions. Word has length 19 [2021-07-13 19:40:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:45,073 INFO L482 AbstractCegarLoop]: Abstraction has 508 states and 1601 transitions. [2021-07-13 19:40:45,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:45,073 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1601 transitions. [2021-07-13 19:40:45,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:45,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:45,074 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:45,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,293 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash -255608602, now seen corresponding path program 67 times [2021-07-13 19:40:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:45,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113205186] [2021-07-13 19:40:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:45,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113205186] [2021-07-13 19:40:45,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113205186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638502882] [2021-07-13 19:40:45,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:45,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:45,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:45,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:45,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:45,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:40:45,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:40:45,744 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:40:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:45,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638502882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:45,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:45,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:45,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815584622] [2021-07-13 19:40:45,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:45,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:45,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:45,797 INFO L87 Difference]: Start difference. First operand 508 states and 1601 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,246 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:40:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:46,515 INFO L93 Difference]: Finished difference Result 827 states and 2411 transitions. [2021-07-13 19:40:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:40:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:46,517 INFO L225 Difference]: With dead ends: 827 [2021-07-13 19:40:46,517 INFO L226 Difference]: Without dead ends: 798 [2021-07-13 19:40:46,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 794.7ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:40:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-07-13 19:40:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 509. [2021-07-13 19:40:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-07-13 19:40:46,524 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-07-13 19:40:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:46,524 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-07-13 19:40:46,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-07-13 19:40:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:46,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:46,525 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:46,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1288 [2021-07-13 19:40:46,726 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:46,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1696046920, now seen corresponding path program 68 times [2021-07-13 19:40:46,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:46,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284774003] [2021-07-13 19:40:46,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:46,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:46,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284774003] [2021-07-13 19:40:46,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284774003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:46,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980222] [2021-07-13 19:40:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:46,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:46,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:46,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:46,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:47,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:47,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:47,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:47,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:47,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:47,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:47,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:47,128 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:47,131 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:47,187 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-07-13 19:40:47,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:47,188 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-07-13 19:40:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:47,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:47,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:47,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:47,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528096746] [2021-07-13 19:40:47,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:47,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:47,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:47,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:47,313 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:48,277 INFO L93 Difference]: Finished difference Result 891 states and 2568 transitions. [2021-07-13 19:40:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:40:48,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:48,279 INFO L225 Difference]: With dead ends: 891 [2021-07-13 19:40:48,279 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 19:40:48,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:40:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 19:40:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 511. [2021-07-13 19:40:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 3.168627450980392) internal successors, (1616), 510 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1616 transitions. [2021-07-13 19:40:48,286 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1616 transitions. Word has length 19 [2021-07-13 19:40:48,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:48,286 INFO L482 AbstractCegarLoop]: Abstraction has 511 states and 1616 transitions. [2021-07-13 19:40:48,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1616 transitions. [2021-07-13 19:40:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:48,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:48,287 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:48,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1300 [2021-07-13 19:40:48,488 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:48,488 INFO L82 PathProgramCache]: Analyzing trace with hash 927157478, now seen corresponding path program 69 times [2021-07-13 19:40:48,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:48,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803005489] [2021-07-13 19:40:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:48,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:48,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803005489] [2021-07-13 19:40:48,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803005489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:48,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892204065] [2021-07-13 19:40:48,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:48,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:40:48,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:48,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:48,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:48,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:48,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:48,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:48,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:48,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:48,909 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:48,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:48,916 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:48,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:48,923 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:48,926 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:48,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:48,929 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:49,010 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-07-13 19:40:49,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:40:49,011 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-07-13 19:40:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:49,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892204065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:49,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:49,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:49,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363526441] [2021-07-13 19:40:49,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:49,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:49,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:49,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:49,129 INFO L87 Difference]: Start difference. First operand 511 states and 1616 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:49,790 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-07-13 19:40:49,950 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 19:40:50,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:50,582 INFO L93 Difference]: Finished difference Result 942 states and 2693 transitions. [2021-07-13 19:40:50,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:50,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:50,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:50,584 INFO L225 Difference]: With dead ends: 942 [2021-07-13 19:40:50,584 INFO L226 Difference]: Without dead ends: 898 [2021-07-13 19:40:50,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1465.4ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:40:50,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-07-13 19:40:50,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 509. [2021-07-13 19:40:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.1633858267716537) internal successors, (1607), 508 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1607 transitions. [2021-07-13 19:40:50,593 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1607 transitions. Word has length 19 [2021-07-13 19:40:50,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:50,593 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1607 transitions. [2021-07-13 19:40:50,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:50,593 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1607 transitions. [2021-07-13 19:40:50,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:50,594 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:50,594 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:50,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-07-13 19:40:50,809 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:50,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:50,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1788432346, now seen corresponding path program 70 times [2021-07-13 19:40:50,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:50,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872854882] [2021-07-13 19:40:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:50,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:50,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872854882] [2021-07-13 19:40:50,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872854882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:50,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986005753] [2021-07-13 19:40:50,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:51,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:40:51,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:51,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:40:51,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:51,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:51,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:51,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,182 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:51,186 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,190 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:51,194 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:51,198 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,202 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:51,206 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:51,210 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:51,214 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:51,218 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:51,427 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 19:40:51,427 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-07-13 19:40:51,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:40:51,430 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-07-13 19:40:51,548 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:40:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:51,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986005753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:51,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:51,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877208469] [2021-07-13 19:40:51,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:51,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:51,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:51,692 INFO L87 Difference]: Start difference. First operand 509 states and 1607 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,157 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-07-13 19:40:52,962 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-07-13 19:40:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:52,985 INFO L93 Difference]: Finished difference Result 993 states and 2820 transitions. [2021-07-13 19:40:52,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:40:52,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:52,987 INFO L225 Difference]: With dead ends: 993 [2021-07-13 19:40:52,987 INFO L226 Difference]: Without dead ends: 943 [2021-07-13 19:40:52,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1329.7ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:40:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-13 19:40:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 515. [2021-07-13 19:40:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-07-13 19:40:52,995 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-07-13 19:40:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:52,995 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-07-13 19:40:52,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-07-13 19:40:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:52,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:52,996 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:53,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-07-13 19:40:53,196 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:53,196 INFO L82 PathProgramCache]: Analyzing trace with hash -496089946, now seen corresponding path program 71 times [2021-07-13 19:40:53,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:53,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654042767] [2021-07-13 19:40:53,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:53,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654042767] [2021-07-13 19:40:53,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654042767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:53,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375471257] [2021-07-13 19:40:53,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:53,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:53,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:53,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:53,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:53,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:53,587 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:53,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:53,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:53,598 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:53,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:53,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:53,610 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:53,614 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:53,618 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:53,622 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:53,626 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:53,630 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:53,633 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:53,637 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:53,801 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:40:53,802 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:40:53,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:53,804 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:40:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375471257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:54,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:54,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:54,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241368926] [2021-07-13 19:40:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:54,066 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:54,551 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:40:54,773 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 19:40:55,003 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 19:40:55,196 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-07-13 19:40:55,367 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2021-07-13 19:40:55,738 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-07-13 19:40:56,027 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 19:40:56,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:56,067 INFO L93 Difference]: Finished difference Result 981 states and 2784 transitions. [2021-07-13 19:40:56,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:40:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:56,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:56,069 INFO L225 Difference]: With dead ends: 981 [2021-07-13 19:40:56,069 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 19:40:56,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2020.6ms TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:40:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 19:40:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 515. [2021-07-13 19:40:56,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.184824902723735) internal successors, (1637), 514 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1637 transitions. [2021-07-13 19:40:56,083 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1637 transitions. Word has length 19 [2021-07-13 19:40:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:56,083 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1637 transitions. [2021-07-13 19:40:56,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1637 transitions. [2021-07-13 19:40:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:56,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:56,084 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:56,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1356,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,300 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:56,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:56,301 INFO L82 PathProgramCache]: Analyzing trace with hash 65191608, now seen corresponding path program 72 times [2021-07-13 19:40:56,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:56,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031073] [2021-07-13 19:40:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:56,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031073] [2021-07-13 19:40:56,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605290209] [2021-07-13 19:40:56,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:56,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:40:56,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:56,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:56,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:56,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:56,706 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:56,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:56,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:56,718 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:56,721 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,724 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:56,724 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:56,727 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:56,731 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:56,734 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:56,737 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:56,796 INFO L628 ElimStorePlain]: treesize reduction 77, result has 44.2 percent of original size [2021-07-13 19:40:56,797 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:56,797 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:397, output treesize:61 [2021-07-13 19:40:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:56,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605290209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:56,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:56,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:40:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411273488] [2021-07-13 19:40:56,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:40:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:56,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:40:56,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:56,894 INFO L87 Difference]: Start difference. First operand 515 states and 1637 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:57,319 INFO L93 Difference]: Finished difference Result 732 states and 2210 transitions. [2021-07-13 19:40:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:40:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:57,321 INFO L225 Difference]: With dead ends: 732 [2021-07-13 19:40:57,321 INFO L226 Difference]: Without dead ends: 717 [2021-07-13 19:40:57,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:40:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-07-13 19:40:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 519. [2021-07-13 19:40:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.193050193050193) internal successors, (1654), 518 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1654 transitions. [2021-07-13 19:40:57,327 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1654 transitions. Word has length 19 [2021-07-13 19:40:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:57,327 INFO L482 AbstractCegarLoop]: Abstraction has 519 states and 1654 transitions. [2021-07-13 19:40:57,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1654 transitions. [2021-07-13 19:40:57,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:57,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:57,328 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:57,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-07-13 19:40:57,533 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1428716114, now seen corresponding path program 73 times [2021-07-13 19:40:57,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:57,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608409963] [2021-07-13 19:40:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:57,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608409963] [2021-07-13 19:40:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608409963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759057195] [2021-07-13 19:40:57,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:57,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:57,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:57,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:40:57,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:57,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:40:57,891 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:57,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:57,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:57,927 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:40:57,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:40:57,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:40:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759057195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:57,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:57,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:40:57,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280722551] [2021-07-13 19:40:57,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:40:57,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:40:57,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:40:57,989 INFO L87 Difference]: Start difference. First operand 519 states and 1654 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:40:58,439 INFO L93 Difference]: Finished difference Result 721 states and 2190 transitions. [2021-07-13 19:40:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:40:58,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:40:58,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:40:58,441 INFO L225 Difference]: With dead ends: 721 [2021-07-13 19:40:58,441 INFO L226 Difference]: Without dead ends: 706 [2021-07-13 19:40:58,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:40:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-07-13 19:40:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 518. [2021-07-13 19:40:58,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.195357833655706) internal successors, (1652), 517 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1652 transitions. [2021-07-13 19:40:58,447 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1652 transitions. Word has length 19 [2021-07-13 19:40:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:40:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 518 states and 1652 transitions. [2021-07-13 19:40:58,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:40:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1652 transitions. [2021-07-13 19:40:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:40:58,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:40:58,448 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:40:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1399 [2021-07-13 19:40:58,648 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:40:58,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:40:58,648 INFO L82 PathProgramCache]: Analyzing trace with hash 816592046, now seen corresponding path program 74 times [2021-07-13 19:40:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:40:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200654006] [2021-07-13 19:40:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:40:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:40:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:40:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200654006] [2021-07-13 19:40:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200654006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500971344] [2021-07-13 19:40:58,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:40:58,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:40:58,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:40:58,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:40:58,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:40:59,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:59,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:59,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:59,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:59,017 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:59,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:59,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:59,029 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:59,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:59,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:59,040 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:40:59,045 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:40:59,048 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:40:59,052 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:40:59,056 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:40:59,060 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:40:59,063 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:40:59,221 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:40:59,222 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:40:59,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:40:59,224 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:40:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:40:59,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500971344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:40:59,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:40:59,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:40:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775127599] [2021-07-13 19:40:59,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:40:59,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:40:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:40:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:40:59,428 INFO L87 Difference]: Start difference. First operand 518 states and 1652 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,288 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-13 19:41:00,837 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-13 19:41:00,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:00,847 INFO L93 Difference]: Finished difference Result 919 states and 2686 transitions. [2021-07-13 19:41:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:41:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:00,849 INFO L225 Difference]: With dead ends: 919 [2021-07-13 19:41:00,849 INFO L226 Difference]: Without dead ends: 904 [2021-07-13 19:41:00,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1516.8ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:00,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2021-07-13 19:41:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 523. [2021-07-13 19:41:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 3.210727969348659) internal successors, (1676), 522 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1676 transitions. [2021-07-13 19:41:00,856 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1676 transitions. Word has length 19 [2021-07-13 19:41:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:00,856 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1676 transitions. [2021-07-13 19:41:00,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1676 transitions. [2021-07-13 19:41:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:00,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:00,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:01,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1411 [2021-07-13 19:41:01,058 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:01,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2108934446, now seen corresponding path program 75 times [2021-07-13 19:41:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809939768] [2021-07-13 19:41:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809939768] [2021-07-13 19:41:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809939768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180038917] [2021-07-13 19:41:01,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:01,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:41:01,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:01,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:01,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:01,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:01,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:01,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:01,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:01,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:01,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:01,418 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:01,422 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:01,426 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:01,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:01,434 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:01,438 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:01,456 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:01,460 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:01,463 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:01,467 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:01,471 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:01,628 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:41:01,628 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:41:01,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:41:01,630 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:41:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180038917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:01,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:01,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:01,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316867593] [2021-07-13 19:41:01,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:01,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:01,871 INFO L87 Difference]: Start difference. First operand 523 states and 1676 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:02,695 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-07-13 19:41:02,937 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-07-13 19:41:03,086 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 19:41:03,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:03,248 INFO L93 Difference]: Finished difference Result 897 states and 2621 transitions. [2021-07-13 19:41:03,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:41:03,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:03,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:03,250 INFO L225 Difference]: With dead ends: 897 [2021-07-13 19:41:03,250 INFO L226 Difference]: Without dead ends: 882 [2021-07-13 19:41:03,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1493.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:03,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-07-13 19:41:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 516. [2021-07-13 19:41:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.1902912621359225) internal successors, (1643), 515 states have internal predecessors, (1643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1643 transitions. [2021-07-13 19:41:03,257 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1643 transitions. Word has length 19 [2021-07-13 19:41:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:03,257 INFO L482 AbstractCegarLoop]: Abstraction has 516 states and 1643 transitions. [2021-07-13 19:41:03,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1643 transitions. [2021-07-13 19:41:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:03,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:03,258 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:03,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-07-13 19:41:03,459 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1568513078, now seen corresponding path program 76 times [2021-07-13 19:41:03,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:03,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452619245] [2021-07-13 19:41:03,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:03,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452619245] [2021-07-13 19:41:03,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452619245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75679150] [2021-07-13 19:41:03,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:03,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:03,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:03,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:03,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:03,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,838 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:03,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:03,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:03,844 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:03,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:03,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:03,860 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:114, output treesize:35 [2021-07-13 19:41:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:03,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75679150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:03,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:03,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:41:03,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557797639] [2021-07-13 19:41:03,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:41:03,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:41:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:03,910 INFO L87 Difference]: Start difference. First operand 516 states and 1643 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:04,301 INFO L93 Difference]: Finished difference Result 913 states and 2714 transitions. [2021-07-13 19:41:04,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:04,302 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:04,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:04,303 INFO L225 Difference]: With dead ends: 913 [2021-07-13 19:41:04,303 INFO L226 Difference]: Without dead ends: 873 [2021-07-13 19:41:04,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 529.0ms TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:41:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-07-13 19:41:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 525. [2021-07-13 19:41:04,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-07-13 19:41:04,310 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-07-13 19:41:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:04,310 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-07-13 19:41:04,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-07-13 19:41:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:04,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:04,311 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:04,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-07-13 19:41:04,512 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:04,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2032632552, now seen corresponding path program 77 times [2021-07-13 19:41:04,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:04,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572815506] [2021-07-13 19:41:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:04,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572815506] [2021-07-13 19:41:04,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572815506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:04,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319656656] [2021-07-13 19:41:04,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:04,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:04,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:04,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:04,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:04,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:04,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:04,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:04,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:04,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:04,959 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-07-13 19:41:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319656656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311662469] [2021-07-13 19:41:05,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:05,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:05,008 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:05,435 INFO L93 Difference]: Finished difference Result 881 states and 2649 transitions. [2021-07-13 19:41:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:05,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:05,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:05,437 INFO L225 Difference]: With dead ends: 881 [2021-07-13 19:41:05,437 INFO L226 Difference]: Without dead ends: 852 [2021-07-13 19:41:05,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:41:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-13 19:41:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 525. [2021-07-13 19:41:05,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.1946564885496183) internal successors, (1674), 524 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1674 transitions. [2021-07-13 19:41:05,444 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1674 transitions. Word has length 19 [2021-07-13 19:41:05,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:05,444 INFO L482 AbstractCegarLoop]: Abstraction has 525 states and 1674 transitions. [2021-07-13 19:41:05,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:05,444 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1674 transitions. [2021-07-13 19:41:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:05,445 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:05,445 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:05,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-07-13 19:41:05,646 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash 592194234, now seen corresponding path program 78 times [2021-07-13 19:41:05,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:05,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833396250] [2021-07-13 19:41:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:05,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:05,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833396250] [2021-07-13 19:41:05,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833396250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:05,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867161285] [2021-07-13 19:41:05,798 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:05,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:05,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:05,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:06,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:06,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:06,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:06,067 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:06,071 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:06,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:06,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:06,082 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:06,086 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:06,089 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:06,093 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:06,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:06,166 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-07-13 19:41:06,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:06,168 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:41:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:06,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867161285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:06,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:06,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683821448] [2021-07-13 19:41:06,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:06,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:06,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:06,278 INFO L87 Difference]: Start difference. First operand 525 states and 1674 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:06,834 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-07-13 19:41:07,070 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2021-07-13 19:41:07,208 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-13 19:41:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:07,238 INFO L93 Difference]: Finished difference Result 945 states and 2800 transitions. [2021-07-13 19:41:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:07,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:07,240 INFO L225 Difference]: With dead ends: 945 [2021-07-13 19:41:07,240 INFO L226 Difference]: Without dead ends: 895 [2021-07-13 19:41:07,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1112.7ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2021-07-13 19:41:07,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 533. [2021-07-13 19:41:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 3.191729323308271) internal successors, (1698), 532 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1698 transitions. [2021-07-13 19:41:07,247 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1698 transitions. Word has length 19 [2021-07-13 19:41:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:07,247 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1698 transitions. [2021-07-13 19:41:07,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:07,247 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1698 transitions. [2021-07-13 19:41:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:07,248 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:07,248 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:07,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1472,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:07,449 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash 653498678, now seen corresponding path program 79 times [2021-07-13 19:41:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:07,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610656800] [2021-07-13 19:41:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:07,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610656800] [2021-07-13 19:41:07,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610656800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532394601] [2021-07-13 19:41:07,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:07,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:07,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:07,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:07,897 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:07,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:07,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:07,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:77, output treesize:35 [2021-07-13 19:41:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:07,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532394601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:07,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:07,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:07,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316368920] [2021-07-13 19:41:07,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:07,967 INFO L87 Difference]: Start difference. First operand 533 states and 1698 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:08,509 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-13 19:41:08,643 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-07-13 19:41:08,956 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2021-07-13 19:41:09,174 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 40 [2021-07-13 19:41:09,432 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-07-13 19:41:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:09,451 INFO L93 Difference]: Finished difference Result 964 states and 2848 transitions. [2021-07-13 19:41:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:09,453 INFO L225 Difference]: With dead ends: 964 [2021-07-13 19:41:09,453 INFO L226 Difference]: Without dead ends: 935 [2021-07-13 19:41:09,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1590.8ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:41:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-13 19:41:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 537. [2021-07-13 19:41:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1940298507462686) internal successors, (1712), 536 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1712 transitions. [2021-07-13 19:41:09,460 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1712 transitions. Word has length 19 [2021-07-13 19:41:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:09,460 INFO L482 AbstractCegarLoop]: Abstraction has 537 states and 1712 transitions. [2021-07-13 19:41:09,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:09,460 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1712 transitions. [2021-07-13 19:41:09,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:09,461 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:09,461 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:09,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1488,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:09,661 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash -113347470, now seen corresponding path program 80 times [2021-07-13 19:41:09,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:09,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650463313] [2021-07-13 19:41:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:09,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:09,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650463313] [2021-07-13 19:41:09,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650463313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:09,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768659173] [2021-07-13 19:41:09,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:09,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:09,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:09,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:10,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:10,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:10,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:10,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:10,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:10,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:10,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:10,097 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:10,170 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-07-13 19:41:10,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:41:10,171 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-07-13 19:41:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:10,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768659173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:10,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:10,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:41:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439156707] [2021-07-13 19:41:10,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:41:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:41:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:10,300 INFO L87 Difference]: Start difference. First operand 537 states and 1712 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:11,043 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-07-13 19:41:11,488 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2021-07-13 19:41:11,881 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2021-07-13 19:41:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:12,129 INFO L93 Difference]: Finished difference Result 1149 states and 3281 transitions. [2021-07-13 19:41:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:41:12,129 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:12,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:12,131 INFO L225 Difference]: With dead ends: 1149 [2021-07-13 19:41:12,131 INFO L226 Difference]: Without dead ends: 1050 [2021-07-13 19:41:12,131 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1942.7ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-13 19:41:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 590. [2021-07-13 19:41:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.191850594227504) internal successors, (1880), 589 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1880 transitions. [2021-07-13 19:41:12,139 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1880 transitions. Word has length 19 [2021-07-13 19:41:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:12,139 INFO L482 AbstractCegarLoop]: Abstraction has 590 states and 1880 transitions. [2021-07-13 19:41:12,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:12,140 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1880 transitions. [2021-07-13 19:41:12,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:12,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:12,140 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:12,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-07-13 19:41:12,341 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash -637536650, now seen corresponding path program 81 times [2021-07-13 19:41:12,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:12,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689428620] [2021-07-13 19:41:12,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689428620] [2021-07-13 19:41:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689428620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936496902] [2021-07-13 19:41:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:12,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:12,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:12,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:12,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:12,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:12,875 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:12,889 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:12,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:12,890 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:41:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:12,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936496902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:12,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:12,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:12,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648567763] [2021-07-13 19:41:12,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:12,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:12,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:12,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:12,944 INFO L87 Difference]: Start difference. First operand 590 states and 1880 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,654 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 19:41:13,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:13,678 INFO L93 Difference]: Finished difference Result 963 states and 2889 transitions. [2021-07-13 19:41:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:13,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:13,680 INFO L225 Difference]: With dead ends: 963 [2021-07-13 19:41:13,680 INFO L226 Difference]: Without dead ends: 934 [2021-07-13 19:41:13,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 967.0ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2021-07-13 19:41:13,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 591. [2021-07-13 19:41:13,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-07-13 19:41:13,687 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-07-13 19:41:13,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:13,687 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-07-13 19:41:13,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-07-13 19:41:13,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:13,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:13,688 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:13,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:13,889 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:13,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2077974968, now seen corresponding path program 82 times [2021-07-13 19:41:13,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:13,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527180754] [2021-07-13 19:41:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527180754] [2021-07-13 19:41:14,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527180754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465292020] [2021-07-13 19:41:14,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:14,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:14,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:14,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:14,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:14,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:14,340 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:14,344 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:14,347 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:14,351 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:14,355 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:14,358 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:14,362 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:14,365 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:14,369 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:14,436 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-07-13 19:41:14,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:14,437 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:41:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:14,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465292020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:14,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:14,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:14,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232998984] [2021-07-13 19:41:14,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:14,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:14,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:14,557 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,228 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 19:41:15,481 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2021-07-13 19:41:15,631 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 19:41:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:15,665 INFO L93 Difference]: Finished difference Result 1034 states and 3055 transitions. [2021-07-13 19:41:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:15,667 INFO L225 Difference]: With dead ends: 1034 [2021-07-13 19:41:15,667 INFO L226 Difference]: Without dead ends: 984 [2021-07-13 19:41:15,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1271.3ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:15,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-07-13 19:41:15,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 593. [2021-07-13 19:41:15,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.2010135135135136) internal successors, (1895), 592 states have internal predecessors, (1895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1895 transitions. [2021-07-13 19:41:15,675 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1895 transitions. Word has length 19 [2021-07-13 19:41:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:15,675 INFO L482 AbstractCegarLoop]: Abstraction has 593 states and 1895 transitions. [2021-07-13 19:41:15,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1895 transitions. [2021-07-13 19:41:15,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:15,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:15,676 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:15,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1524 [2021-07-13 19:41:15,876 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash 545229430, now seen corresponding path program 83 times [2021-07-13 19:41:15,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:15,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185076658] [2021-07-13 19:41:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185076658] [2021-07-13 19:41:16,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185076658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825329482] [2021-07-13 19:41:16,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:16,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:16,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:16,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:16,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:16,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:16,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:16,479 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:16,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:16,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:16,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:16,535 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-07-13 19:41:16,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:16,536 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-07-13 19:41:16,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:16,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825329482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:16,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:16,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:16,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563017916] [2021-07-13 19:41:16,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:16,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:16,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:16,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:16,631 INFO L87 Difference]: Start difference. First operand 593 states and 1895 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:16,910 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-07-13 19:41:17,195 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-07-13 19:41:17,360 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2021-07-13 19:41:17,551 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-07-13 19:41:17,779 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-07-13 19:41:18,057 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-07-13 19:41:18,209 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-13 19:41:18,431 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 57 [2021-07-13 19:41:18,651 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-07-13 19:41:18,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:18,683 INFO L93 Difference]: Finished difference Result 1015 states and 3000 transitions. [2021-07-13 19:41:18,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:18,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:18,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:18,685 INFO L225 Difference]: With dead ends: 1015 [2021-07-13 19:41:18,685 INFO L226 Difference]: Without dead ends: 971 [2021-07-13 19:41:18,685 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2230.0ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:41:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-07-13 19:41:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 591. [2021-07-13 19:41:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1966101694915254) internal successors, (1886), 590 states have internal predecessors, (1886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1886 transitions. [2021-07-13 19:41:18,693 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1886 transitions. Word has length 19 [2021-07-13 19:41:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:18,693 INFO L482 AbstractCegarLoop]: Abstraction has 591 states and 1886 transitions. [2021-07-13 19:41:18,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1886 transitions. [2021-07-13 19:41:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:18,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:18,694 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:18,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1540 [2021-07-13 19:41:18,894 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash 2124606902, now seen corresponding path program 84 times [2021-07-13 19:41:18,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:18,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857257851] [2021-07-13 19:41:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:19,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857257851] [2021-07-13 19:41:19,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857257851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068360074] [2021-07-13 19:41:19,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:19,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:19,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:19,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:19,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:19,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:19,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,298 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:19,303 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:19,307 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:19,311 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,316 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:19,320 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,324 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:19,329 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:19,332 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:19,336 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,340 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,344 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:19,348 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:19,352 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:19,356 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:19,360 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:19,572 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:41:19,573 INFO L628 ElimStorePlain]: treesize reduction 97, result has 69.6 percent of original size [2021-07-13 19:41:19,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:41:19,575 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-07-13 19:41:19,696 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:41:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:19,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068360074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:19,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:19,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:19,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676165058] [2021-07-13 19:41:19,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:19,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:19,829 INFO L87 Difference]: Start difference. First operand 591 states and 1886 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:20,491 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-07-13 19:41:20,725 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-07-13 19:41:20,988 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-13 19:41:21,174 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 19:41:21,290 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2021-07-13 19:41:21,544 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-13 19:41:21,865 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-07-13 19:41:22,044 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2021-07-13 19:41:22,527 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-07-13 19:41:22,780 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 19:41:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:22,780 INFO L93 Difference]: Finished difference Result 1188 states and 3415 transitions. [2021-07-13 19:41:22,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:22,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:22,782 INFO L225 Difference]: With dead ends: 1188 [2021-07-13 19:41:22,782 INFO L226 Difference]: Without dead ends: 1088 [2021-07-13 19:41:22,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3050.0ms TimeCoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:41:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-07-13 19:41:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 599. [2021-07-13 19:41:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.2157190635451505) internal successors, (1923), 598 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1923 transitions. [2021-07-13 19:41:22,791 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1923 transitions. Word has length 19 [2021-07-13 19:41:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:22,791 INFO L482 AbstractCegarLoop]: Abstraction has 599 states and 1923 transitions. [2021-07-13 19:41:22,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1923 transitions. [2021-07-13 19:41:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:22,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:22,792 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:22,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1556 [2021-07-13 19:41:22,997 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash -878017994, now seen corresponding path program 85 times [2021-07-13 19:41:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:22,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515850383] [2021-07-13 19:41:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:23,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515850383] [2021-07-13 19:41:23,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515850383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755401552] [2021-07-13 19:41:23,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:23,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:23,400 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:23,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:23,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:23,419 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,423 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:23,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:23,432 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,436 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:23,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:23,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:23,449 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,453 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,458 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:23,462 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:23,466 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,470 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:23,474 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:23,478 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:23,482 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:23,486 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:23,490 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:23,702 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 19:41:23,703 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-07-13 19:41:23,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:41:23,705 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-07-13 19:41:23,825 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:41:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:24,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755401552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:24,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:24,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:24,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706869615] [2021-07-13 19:41:24,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:24,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:24,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:24,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:24,047 INFO L87 Difference]: Start difference. First operand 599 states and 1923 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:24,976 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-07-13 19:41:25,255 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-07-13 19:41:25,564 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2021-07-13 19:41:25,891 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2021-07-13 19:41:26,074 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-07-13 19:41:26,290 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2021-07-13 19:41:26,626 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-07-13 19:41:26,781 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2021-07-13 19:41:26,937 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2021-07-13 19:41:27,329 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 62 [2021-07-13 19:41:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:27,455 INFO L93 Difference]: Finished difference Result 1095 states and 3202 transitions. [2021-07-13 19:41:27,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:41:27,455 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:27,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:27,457 INFO L225 Difference]: With dead ends: 1095 [2021-07-13 19:41:27,457 INFO L226 Difference]: Without dead ends: 1025 [2021-07-13 19:41:27,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3472.8ms TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:27,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-07-13 19:41:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 596. [2021-07-13 19:41:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.196638655462185) internal successors, (1902), 595 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1902 transitions. [2021-07-13 19:41:27,467 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1902 transitions. Word has length 19 [2021-07-13 19:41:27,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:27,467 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 1902 transitions. [2021-07-13 19:41:27,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1902 transitions. [2021-07-13 19:41:27,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:27,468 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:27,468 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:27,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1577 [2021-07-13 19:41:27,669 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1960185702, now seen corresponding path program 86 times [2021-07-13 19:41:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:27,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291264390] [2021-07-13 19:41:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:27,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:27,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:27,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291264390] [2021-07-13 19:41:27,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291264390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:27,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174985329] [2021-07-13 19:41:27,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:27,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:28,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:28,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:28,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:28,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:41:28,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:41:28,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:51, output treesize:35 [2021-07-13 19:41:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174985329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437385648] [2021-07-13 19:41:28,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:28,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:28,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:28,199 INFO L87 Difference]: Start difference. First operand 596 states and 1902 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,587 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-13 19:41:28,736 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2021-07-13 19:41:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:28,967 INFO L93 Difference]: Finished difference Result 952 states and 2884 transitions. [2021-07-13 19:41:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:41:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:28,969 INFO L225 Difference]: With dead ends: 952 [2021-07-13 19:41:28,969 INFO L226 Difference]: Without dead ends: 923 [2021-07-13 19:41:28,969 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 898.1ms TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:28,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-07-13 19:41:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 598. [2021-07-13 19:41:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.204355108877722) internal successors, (1913), 597 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1913 transitions. [2021-07-13 19:41:28,977 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1913 transitions. Word has length 19 [2021-07-13 19:41:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:28,977 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1913 transitions. [2021-07-13 19:41:28,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1913 transitions. [2021-07-13 19:41:28,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:28,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:28,978 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:29,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1598 [2021-07-13 19:41:29,179 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:29,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:29,179 INFO L82 PathProgramCache]: Analyzing trace with hash 519747384, now seen corresponding path program 87 times [2021-07-13 19:41:29,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:29,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539633856] [2021-07-13 19:41:29,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539633856] [2021-07-13 19:41:29,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539633856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206761245] [2021-07-13 19:41:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:29,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:29,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:29,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:29,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:29,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:29,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:29,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:29,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:29,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:29,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:29,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:29,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:29,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:29,737 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:29,741 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:29,744 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:29,748 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:29,815 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-07-13 19:41:29,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:29,816 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:41:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:29,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206761245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:29,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:29,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:29,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651365755] [2021-07-13 19:41:29,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:29,927 INFO L87 Difference]: Start difference. First operand 598 states and 1913 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,620 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-07-13 19:41:30,863 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2021-07-13 19:41:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:30,902 INFO L93 Difference]: Finished difference Result 1023 states and 3050 transitions. [2021-07-13 19:41:30,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:30,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:30,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:30,903 INFO L225 Difference]: With dead ends: 1023 [2021-07-13 19:41:30,904 INFO L226 Difference]: Without dead ends: 973 [2021-07-13 19:41:30,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1211.5ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:30,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-07-13 19:41:30,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 602. [2021-07-13 19:41:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2096505823627286) internal successors, (1929), 601 states have internal predecessors, (1929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1929 transitions. [2021-07-13 19:41:30,917 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1929 transitions. Word has length 19 [2021-07-13 19:41:30,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:30,917 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1929 transitions. [2021-07-13 19:41:30,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:30,917 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1929 transitions. [2021-07-13 19:41:30,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:30,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:30,917 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:31,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1606,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,118 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:31,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1152015514, now seen corresponding path program 88 times [2021-07-13 19:41:31,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:31,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110349434] [2021-07-13 19:41:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:31,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110349434] [2021-07-13 19:41:31,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110349434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967745135] [2021-07-13 19:41:31,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:31,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:31,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:31,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:31,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:31,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:31,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:31,550 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:31,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:31,557 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:31,560 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:31,633 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-07-13 19:41:31,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:41:31,634 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:224, output treesize:81 [2021-07-13 19:41:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967745135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:31,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:31,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964142039] [2021-07-13 19:41:31,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:31,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:31,747 INFO L87 Difference]: Start difference. First operand 602 states and 1929 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,223 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-07-13 19:41:32,459 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-07-13 19:41:32,700 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-13 19:41:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:32,965 INFO L93 Difference]: Finished difference Result 1114 states and 3328 transitions. [2021-07-13 19:41:32,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:41:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:32,967 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:41:32,967 INFO L226 Difference]: Without dead ends: 1042 [2021-07-13 19:41:32,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1243.5ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:41:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-13 19:41:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 607. [2021-07-13 19:41:32,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 607 states, 606 states have (on average 3.222772277227723) internal successors, (1953), 606 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 607 states to 607 states and 1953 transitions. [2021-07-13 19:41:32,976 INFO L78 Accepts]: Start accepts. Automaton has 607 states and 1953 transitions. Word has length 19 [2021-07-13 19:41:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:32,976 INFO L482 AbstractCegarLoop]: Abstraction has 607 states and 1953 transitions. [2021-07-13 19:41:32,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states and 1953 transitions. [2021-07-13 19:41:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:32,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:32,977 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:33,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1622 [2021-07-13 19:41:33,181 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1719704358, now seen corresponding path program 89 times [2021-07-13 19:41:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719755219] [2021-07-13 19:41:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:33,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:33,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719755219] [2021-07-13 19:41:33,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719755219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:33,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811546837] [2021-07-13 19:41:33,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:33,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:33,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:33,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:33,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:33,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:33,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:33,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:33,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:33,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,611 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:33,615 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:33,620 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:33,625 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:33,629 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:33,634 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:33,638 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,643 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:33,647 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:33,651 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,656 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:33,660 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,664 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,668 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:33,672 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:33,676 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:33,680 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:33,684 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:33,688 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:33,692 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:33,861 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 19:41:33,861 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-07-13 19:41:33,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:41:33,863 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-07-13 19:41:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:34,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811546837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:34,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:34,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083670538] [2021-07-13 19:41:34,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:34,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:34,108 INFO L87 Difference]: Start difference. First operand 607 states and 1953 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:34,701 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-13 19:41:34,886 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 19:41:35,146 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 19:41:35,416 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 19:41:35,600 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-07-13 19:41:35,777 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 19:41:35,967 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 19:41:36,141 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2021-07-13 19:41:36,281 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-13 19:41:36,551 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2021-07-13 19:41:36,780 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2021-07-13 19:41:37,088 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-07-13 19:41:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:37,109 INFO L93 Difference]: Finished difference Result 1128 states and 3321 transitions. [2021-07-13 19:41:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:37,111 INFO L225 Difference]: With dead ends: 1128 [2021-07-13 19:41:37,111 INFO L226 Difference]: Without dead ends: 1098 [2021-07-13 19:41:37,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2995.0ms TimeCoverageRelationStatistics Valid=223, Invalid=899, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:41:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-07-13 19:41:37,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 610. [2021-07-13 19:41:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 3.231527093596059) internal successors, (1968), 609 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 1968 transitions. [2021-07-13 19:41:37,121 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 1968 transitions. Word has length 19 [2021-07-13 19:41:37,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:37,121 INFO L482 AbstractCegarLoop]: Abstraction has 610 states and 1968 transitions. [2021-07-13 19:41:37,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 1968 transitions. [2021-07-13 19:41:37,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:37,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:37,122 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:37,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1636,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,326 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:37,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:37,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1344506918, now seen corresponding path program 90 times [2021-07-13 19:41:37,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:37,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484740113] [2021-07-13 19:41:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:37,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:37,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:37,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484740113] [2021-07-13 19:41:37,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484740113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:37,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358227350] [2021-07-13 19:41:37,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:37,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:41:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:37,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:37,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:37,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:37,716 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:37,721 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,725 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:37,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,734 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:37,739 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,743 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,747 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:37,756 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,759 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:37,764 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,768 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,772 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:37,776 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:37,780 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:37,784 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:37,788 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:37,791 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:37,962 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:41:37,963 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-07-13 19:41:37,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:41:37,964 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-07-13 19:41:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:38,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358227350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:38,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:38,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:38,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429367314] [2021-07-13 19:41:38,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:38,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:38,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:38,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:38,243 INFO L87 Difference]: Start difference. First operand 610 states and 1968 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:38,793 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-07-13 19:41:38,966 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2021-07-13 19:41:39,221 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2021-07-13 19:41:39,482 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-07-13 19:41:39,637 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-07-13 19:41:39,820 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-07-13 19:41:39,984 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2021-07-13 19:41:40,165 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 19:41:40,325 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-13 19:41:40,477 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-07-13 19:41:40,654 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-07-13 19:41:40,814 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-07-13 19:41:41,110 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2021-07-13 19:41:41,295 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-07-13 19:41:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:41,295 INFO L93 Difference]: Finished difference Result 1120 states and 3320 transitions. [2021-07-13 19:41:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:41,296 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:41,298 INFO L225 Difference]: With dead ends: 1120 [2021-07-13 19:41:41,298 INFO L226 Difference]: Without dead ends: 1090 [2021-07-13 19:41:41,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3136.0ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:41:41,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-13 19:41:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 608. [2021-07-13 19:41:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.227347611202636) internal successors, (1959), 607 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1959 transitions. [2021-07-13 19:41:41,310 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1959 transitions. Word has length 19 [2021-07-13 19:41:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:41,310 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1959 transitions. [2021-07-13 19:41:41,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1959 transitions. [2021-07-13 19:41:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:41,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:41,311 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:41,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-07-13 19:41:41,511 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:41,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:41,512 INFO L82 PathProgramCache]: Analyzing trace with hash -926613804, now seen corresponding path program 91 times [2021-07-13 19:41:41,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:41,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482584021] [2021-07-13 19:41:41,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:41,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482584021] [2021-07-13 19:41:41,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482584021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:41,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668288881] [2021-07-13 19:41:41,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:41,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:41,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:41,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:41,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:41,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:41,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:41,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:41,965 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:41,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:41,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:42,039 INFO L628 ElimStorePlain]: treesize reduction 26, result has 75.7 percent of original size [2021-07-13 19:41:42,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:41:42,040 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:189, output treesize:81 [2021-07-13 19:41:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668288881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:42,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:42,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:42,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896950899] [2021-07-13 19:41:42,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:42,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:42,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:42,172 INFO L87 Difference]: Start difference. First operand 608 states and 1959 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:42,860 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2021-07-13 19:41:43,108 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-07-13 19:41:43,272 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2021-07-13 19:41:43,480 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 19:41:43,645 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 19:41:43,842 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2021-07-13 19:41:43,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:43,891 INFO L93 Difference]: Finished difference Result 1040 states and 3069 transitions. [2021-07-13 19:41:43,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:43,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:43,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:43,893 INFO L225 Difference]: With dead ends: 1040 [2021-07-13 19:41:43,893 INFO L226 Difference]: Without dead ends: 1003 [2021-07-13 19:41:43,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1820.4ms TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:41:43,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2021-07-13 19:41:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 608. [2021-07-13 19:41:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.224052718286656) internal successors, (1957), 607 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1957 transitions. [2021-07-13 19:41:43,902 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1957 transitions. Word has length 19 [2021-07-13 19:41:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:43,902 INFO L482 AbstractCegarLoop]: Abstraction has 608 states and 1957 transitions. [2021-07-13 19:41:43,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:43,902 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1957 transitions. [2021-07-13 19:41:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:43,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:43,903 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:44,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-07-13 19:41:44,104 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:44,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:44,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1491616842, now seen corresponding path program 92 times [2021-07-13 19:41:44,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:44,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134175658] [2021-07-13 19:41:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134175658] [2021-07-13 19:41:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134175658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240698345] [2021-07-13 19:41:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:44,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:44,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:44,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:44,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:44,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:44,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:44,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:44,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:44,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:44,524 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:44,593 INFO L628 ElimStorePlain]: treesize reduction 4, result has 95.4 percent of original size [2021-07-13 19:41:44,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:41:44,594 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 1 variables, input treesize:158, output treesize:83 [2021-07-13 19:41:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:44,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240698345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:44,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:44,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:44,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559178250] [2021-07-13 19:41:44,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:44,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:44,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:44,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:44,796 INFO L87 Difference]: Start difference. First operand 608 states and 1957 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:45,441 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-07-13 19:41:45,613 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2021-07-13 19:41:45,732 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-07-13 19:41:45,971 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-07-13 19:41:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:46,231 INFO L93 Difference]: Finished difference Result 1117 states and 3285 transitions. [2021-07-13 19:41:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:41:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:46,233 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:41:46,233 INFO L226 Difference]: Without dead ends: 1038 [2021-07-13 19:41:46,234 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1578.5ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:41:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-07-13 19:41:46,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 615. [2021-07-13 19:41:46,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 614 states have (on average 3.239413680781759) internal successors, (1989), 614 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 1989 transitions. [2021-07-13 19:41:46,242 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 1989 transitions. Word has length 19 [2021-07-13 19:41:46,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:46,242 INFO L482 AbstractCegarLoop]: Abstraction has 615 states and 1989 transitions. [2021-07-13 19:41:46,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 1989 transitions. [2021-07-13 19:41:46,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:46,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:46,243 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:46,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1698 [2021-07-13 19:41:46,444 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:46,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash 497471994, now seen corresponding path program 93 times [2021-07-13 19:41:46,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:46,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456010114] [2021-07-13 19:41:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:46,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456010114] [2021-07-13 19:41:46,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456010114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:46,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124459940] [2021-07-13 19:41:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:46,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:41:46,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:46,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:46,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:46,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:46,992 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:46,996 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:47,000 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:47,004 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:47,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:47,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:47,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:47,131 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-07-13 19:41:47,131 INFO L628 ElimStorePlain]: treesize reduction 28, result has 82.6 percent of original size [2021-07-13 19:41:47,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:41:47,133 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-07-13 19:41:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124459940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:47,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139567155] [2021-07-13 19:41:47,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:47,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:47,449 INFO L87 Difference]: Start difference. First operand 615 states and 1989 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:47,911 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:41:48,150 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-07-13 19:41:48,346 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-07-13 19:41:48,579 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-07-13 19:41:48,800 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-07-13 19:41:48,919 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2021-07-13 19:41:49,053 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2021-07-13 19:41:49,331 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 19:41:49,484 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2021-07-13 19:41:49,736 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-07-13 19:41:50,024 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2021-07-13 19:41:50,268 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-07-13 19:41:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:50,269 INFO L93 Difference]: Finished difference Result 1317 states and 3854 transitions. [2021-07-13 19:41:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:41:50,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:50,271 INFO L225 Difference]: With dead ends: 1317 [2021-07-13 19:41:50,271 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:41:50,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 3178.8ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:41:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:41:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 637. [2021-07-13 19:41:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.279874213836478) internal successors, (2086), 636 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2086 transitions. [2021-07-13 19:41:50,281 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2086 transitions. Word has length 19 [2021-07-13 19:41:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:50,281 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2086 transitions. [2021-07-13 19:41:50,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2086 transitions. [2021-07-13 19:41:50,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:50,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:50,282 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:50,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1713,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,482 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:50,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1789814394, now seen corresponding path program 94 times [2021-07-13 19:41:50,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:50,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228984922] [2021-07-13 19:41:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:50,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228984922] [2021-07-13 19:41:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228984922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574762323] [2021-07-13 19:41:50,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:50,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:41:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:50,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:50,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:50,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:50,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:50,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:50,992 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:50,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:51,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:51,004 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:51,007 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:51,127 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-07-13 19:41:51,127 INFO L628 ElimStorePlain]: treesize reduction 52, result has 71.9 percent of original size [2021-07-13 19:41:51,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:41:51,129 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:322, output treesize:133 [2021-07-13 19:41:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:51,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574762323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:51,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:51,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:51,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988302934] [2021-07-13 19:41:51,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:51,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:51,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:51,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:51,452 INFO L87 Difference]: Start difference. First operand 637 states and 2086 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:51,951 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-07-13 19:41:52,196 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-07-13 19:41:52,441 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-07-13 19:41:52,556 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-07-13 19:41:52,793 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-07-13 19:41:53,041 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-07-13 19:41:53,183 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 19:41:53,320 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2021-07-13 19:41:53,482 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-07-13 19:41:53,748 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-07-13 19:41:53,910 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-07-13 19:41:54,188 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-07-13 19:41:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:54,235 INFO L93 Difference]: Finished difference Result 1320 states and 3825 transitions. [2021-07-13 19:41:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:41:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:54,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:54,237 INFO L225 Difference]: With dead ends: 1320 [2021-07-13 19:41:54,237 INFO L226 Difference]: Without dead ends: 1250 [2021-07-13 19:41:54,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 3078.4ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:41:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-07-13 19:41:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 631. [2021-07-13 19:41:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.2634920634920634) internal successors, (2056), 630 states have internal predecessors, (2056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2056 transitions. [2021-07-13 19:41:54,248 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2056 transitions. Word has length 19 [2021-07-13 19:41:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:54,248 INFO L482 AbstractCegarLoop]: Abstraction has 631 states and 2056 transitions. [2021-07-13 19:41:54,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2056 transitions. [2021-07-13 19:41:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:54,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:54,249 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:54,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1730 [2021-07-13 19:41:54,449 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1830486540, now seen corresponding path program 95 times [2021-07-13 19:41:54,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:54,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606051210] [2021-07-13 19:41:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:54,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606051210] [2021-07-13 19:41:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606051210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926432232] [2021-07-13 19:41:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:54,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:54,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:54,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:54,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:54,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:54,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:54,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:54,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,774 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:54,775 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:54,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:54,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:54,785 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:54,789 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:54,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:54,795 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:54,878 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-07-13 19:41:54,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:41:54,879 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-07-13 19:41:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:55,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926432232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:55,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:55,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:41:55,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526759984] [2021-07-13 19:41:55,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:41:55,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:41:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:41:55,088 INFO L87 Difference]: Start difference. First operand 631 states and 2056 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:55,472 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-07-13 19:41:55,608 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-07-13 19:41:55,780 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-07-13 19:41:55,919 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-07-13 19:41:56,110 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 19:41:56,255 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-07-13 19:41:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:56,303 INFO L93 Difference]: Finished difference Result 1010 states and 3060 transitions. [2021-07-13 19:41:56,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:41:56,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:56,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:56,305 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 19:41:56,305 INFO L226 Difference]: Without dead ends: 960 [2021-07-13 19:41:56,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1291.7ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:41:56,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-07-13 19:41:56,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 624. [2021-07-13 19:41:56,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 3.2520064205457464) internal successors, (2026), 623 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 2026 transitions. [2021-07-13 19:41:56,314 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 2026 transitions. Word has length 19 [2021-07-13 19:41:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:56,314 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 2026 transitions. [2021-07-13 19:41:56,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 2026 transitions. [2021-07-13 19:41:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:56,314 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:56,314 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:56,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1751,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:56,515 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1145795884, now seen corresponding path program 96 times [2021-07-13 19:41:56,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:56,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689539778] [2021-07-13 19:41:56,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:56,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:56,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689539778] [2021-07-13 19:41:56,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689539778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725177552] [2021-07-13 19:41:56,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:56,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:41:56,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:56,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:56,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:56,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:56,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:56,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:41:56,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:41:56,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:56,927 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:41:56,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:56,928 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:41:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:56,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725177552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:56,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:56,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:56,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713367026] [2021-07-13 19:41:56,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:56,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:56,983 INFO L87 Difference]: Start difference. First operand 624 states and 2026 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:57,681 INFO L93 Difference]: Finished difference Result 868 states and 2676 transitions. [2021-07-13 19:41:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:57,682 INFO L225 Difference]: With dead ends: 868 [2021-07-13 19:41:57,682 INFO L226 Difference]: Without dead ends: 839 [2021-07-13 19:41:57,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:41:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-07-13 19:41:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 629. [2021-07-13 19:41:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-07-13 19:41:57,690 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-07-13 19:41:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:57,690 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-07-13 19:41:57,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-07-13 19:41:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:57,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:57,691 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:57,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-07-13 19:41:57,891 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash -294642434, now seen corresponding path program 97 times [2021-07-13 19:41:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:57,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313046092] [2021-07-13 19:41:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313046092] [2021-07-13 19:41:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313046092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212793849] [2021-07-13 19:41:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:58,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:41:58,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:58,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:58,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:58,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:58,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:58,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:58,275 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:58,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:58,284 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:58,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:58,292 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:58,297 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:58,301 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:58,305 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:58,391 INFO L628 ElimStorePlain]: treesize reduction 82, result has 45.0 percent of original size [2021-07-13 19:41:58,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:58,392 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:41:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:58,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212793849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:58,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:58,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:41:58,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825863972] [2021-07-13 19:41:58,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:41:58,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:58,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:41:58,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:41:58,528 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:41:59,062 INFO L93 Difference]: Finished difference Result 892 states and 2724 transitions. [2021-07-13 19:41:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:41:59,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:41:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:41:59,064 INFO L225 Difference]: With dead ends: 892 [2021-07-13 19:41:59,064 INFO L226 Difference]: Without dead ends: 842 [2021-07-13 19:41:59,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:41:59,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-07-13 19:41:59,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 629. [2021-07-13 19:41:59,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-07-13 19:41:59,072 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-07-13 19:41:59,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:41:59,072 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-07-13 19:41:59,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:41:59,072 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-07-13 19:41:59,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:41:59,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:41:59,072 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:41:59,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-07-13 19:41:59,273 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:41:59,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:41:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1854154102, now seen corresponding path program 98 times [2021-07-13 19:41:59,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:41:59,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252822197] [2021-07-13 19:41:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:41:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:41:59,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:41:59,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252822197] [2021-07-13 19:41:59,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252822197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598868973] [2021-07-13 19:41:59,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:41:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:41:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:41:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:41:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:41:59,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:59,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:59,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:41:59,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:59,613 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:41:59,616 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:59,620 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:59,623 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:41:59,626 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:41:59,630 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:41:59,633 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:41:59,636 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:41:59,689 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:41:59,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:41:59,690 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:41:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:41:59,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598868973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:41:59,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:41:59,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:41:59,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737365111] [2021-07-13 19:41:59,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:41:59,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:41:59,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:41:59,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:41:59,793 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:00,177 INFO L93 Difference]: Finished difference Result 819 states and 2567 transitions. [2021-07-13 19:42:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:00,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:00,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:00,179 INFO L225 Difference]: With dead ends: 819 [2021-07-13 19:42:00,179 INFO L226 Difference]: Without dead ends: 804 [2021-07-13 19:42:00,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:42:00,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-07-13 19:42:00,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 629. [2021-07-13 19:42:00,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 3.2563694267515926) internal successors, (2045), 628 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 2045 transitions. [2021-07-13 19:42:00,186 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 2045 transitions. Word has length 19 [2021-07-13 19:42:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:00,187 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 2045 transitions. [2021-07-13 19:42:00,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 2045 transitions. [2021-07-13 19:42:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:00,187 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:00,187 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:00,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1797 [2021-07-13 19:42:00,388 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:00,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:00,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1330594314, now seen corresponding path program 99 times [2021-07-13 19:42:00,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:00,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753613082] [2021-07-13 19:42:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753613082] [2021-07-13 19:42:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753613082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536274091] [2021-07-13 19:42:00,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:00,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:00,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:00,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:00,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:00,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:00,785 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:00,788 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:00,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:00,794 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:00,829 INFO L628 ElimStorePlain]: treesize reduction 30, result has 58.9 percent of original size [2021-07-13 19:42:00,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:00,830 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:155, output treesize:43 [2021-07-13 19:42:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:00,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536274091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:00,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:00,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:00,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88969048] [2021-07-13 19:42:00,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:00,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:00,886 INFO L87 Difference]: Start difference. First operand 629 states and 2045 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:01,545 INFO L93 Difference]: Finished difference Result 971 states and 2936 transitions. [2021-07-13 19:42:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:01,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:01,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:01,547 INFO L225 Difference]: With dead ends: 971 [2021-07-13 19:42:01,547 INFO L226 Difference]: Without dead ends: 942 [2021-07-13 19:42:01,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:01,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-07-13 19:42:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 632. [2021-07-13 19:42:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 3.2646592709984152) internal successors, (2060), 631 states have internal predecessors, (2060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 2060 transitions. [2021-07-13 19:42:01,555 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 2060 transitions. Word has length 19 [2021-07-13 19:42:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:01,555 INFO L482 AbstractCegarLoop]: Abstraction has 632 states and 2060 transitions. [2021-07-13 19:42:01,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 2060 transitions. [2021-07-13 19:42:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:01,556 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:01,556 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:01,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1815,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,756 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:01,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:01,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1523934664, now seen corresponding path program 100 times [2021-07-13 19:42:01,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:01,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990032676] [2021-07-13 19:42:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:01,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990032676] [2021-07-13 19:42:01,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990032676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:01,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429460011] [2021-07-13 19:42:01,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:01,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:01,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:02,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:02,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:02,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:02,139 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:02,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:02,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:02,149 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:02,152 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:02,156 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:02,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:02,221 INFO L628 ElimStorePlain]: treesize reduction 4, result has 94.4 percent of original size [2021-07-13 19:42:02,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:02,222 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:42:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:02,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429460011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:02,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:02,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:02,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850479063] [2021-07-13 19:42:02,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:02,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:02,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:02,332 INFO L87 Difference]: Start difference. First operand 632 states and 2060 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:02,751 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-07-13 19:42:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:03,222 INFO L93 Difference]: Finished difference Result 1072 states and 3158 transitions. [2021-07-13 19:42:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:03,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:03,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:03,224 INFO L225 Difference]: With dead ends: 1072 [2021-07-13 19:42:03,224 INFO L226 Difference]: Without dead ends: 1014 [2021-07-13 19:42:03,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 898.6ms TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-07-13 19:42:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 641. [2021-07-13 19:42:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.265625) internal successors, (2090), 640 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 2090 transitions. [2021-07-13 19:42:03,233 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 2090 transitions. Word has length 19 [2021-07-13 19:42:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:03,233 INFO L482 AbstractCegarLoop]: Abstraction has 641 states and 2090 transitions. [2021-07-13 19:42:03,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 2090 transitions. [2021-07-13 19:42:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:03,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:03,234 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:03,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,435 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash -147828234, now seen corresponding path program 101 times [2021-07-13 19:42:03,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:03,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68143552] [2021-07-13 19:42:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68143552] [2021-07-13 19:42:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68143552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281566814] [2021-07-13 19:42:03,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:03,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:03,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:03,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:03,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:03,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:03,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:03,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:03,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:03,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:03,874 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-07-13 19:42:03,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:03,875 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-07-13 19:42:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:03,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281566814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:03,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:03,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:03,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185920224] [2021-07-13 19:42:03,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:03,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:03,969 INFO L87 Difference]: Start difference. First operand 641 states and 2090 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,578 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2021-07-13 19:42:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:04,883 INFO L93 Difference]: Finished difference Result 1019 states and 3029 transitions. [2021-07-13 19:42:04,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:42:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:04,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:04,885 INFO L225 Difference]: With dead ends: 1019 [2021-07-13 19:42:04,885 INFO L226 Difference]: Without dead ends: 975 [2021-07-13 19:42:04,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 923.4ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:04,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-07-13 19:42:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 639. [2021-07-13 19:42:04,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.261755485893417) internal successors, (2081), 638 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2081 transitions. [2021-07-13 19:42:04,894 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2081 transitions. Word has length 19 [2021-07-13 19:42:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:04,894 INFO L482 AbstractCegarLoop]: Abstraction has 639 states and 2081 transitions. [2021-07-13 19:42:04,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2081 transitions. [2021-07-13 19:42:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:04,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:04,895 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:05,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1846 [2021-07-13 19:42:05,095 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:05,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:05,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1431549238, now seen corresponding path program 102 times [2021-07-13 19:42:05,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:05,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268541302] [2021-07-13 19:42:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:05,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:05,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:05,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268541302] [2021-07-13 19:42:05,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268541302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:05,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282758981] [2021-07-13 19:42:05,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:05,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:05,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:05,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:05,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:05,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:05,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:05,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:05,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:05,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:05,580 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:05,584 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,588 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,593 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:05,597 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,601 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:05,605 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:05,626 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:05,630 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,633 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:05,634 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:05,638 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:05,642 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:05,652 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:05,816 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 19:42:05,816 INFO L628 ElimStorePlain]: treesize reduction 183, result has 49.4 percent of original size [2021-07-13 19:42:05,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:42:05,818 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:179 [2021-07-13 19:42:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282758981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:06,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:06,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:06,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266210264] [2021-07-13 19:42:06,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:06,025 INFO L87 Difference]: Start difference. First operand 639 states and 2081 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:06,728 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-07-13 19:42:07,361 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-07-13 19:42:07,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:07,384 INFO L93 Difference]: Finished difference Result 1140 states and 3364 transitions. [2021-07-13 19:42:07,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:07,384 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:07,386 INFO L225 Difference]: With dead ends: 1140 [2021-07-13 19:42:07,386 INFO L226 Difference]: Without dead ends: 1096 [2021-07-13 19:42:07,386 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1435.3ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-07-13 19:42:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 645. [2021-07-13 19:42:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.277950310559006) internal successors, (2111), 644 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2111 transitions. [2021-07-13 19:42:07,395 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2111 transitions. Word has length 19 [2021-07-13 19:42:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:07,395 INFO L482 AbstractCegarLoop]: Abstraction has 645 states and 2111 transitions. [2021-07-13 19:42:07,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:07,395 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2111 transitions. [2021-07-13 19:42:07,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:07,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:07,396 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:07,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1861 [2021-07-13 19:42:07,597 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1571075658, now seen corresponding path program 103 times [2021-07-13 19:42:07,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:07,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491204209] [2021-07-13 19:42:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:07,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491204209] [2021-07-13 19:42:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491204209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:07,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371193401] [2021-07-13 19:42:07,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:07,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:07,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:07,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:07,990 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:07,995 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:07,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:07,999 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:08,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:08,008 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:08,012 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:08,016 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:08,020 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:08,024 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:08,028 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:08,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:08,036 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:08,040 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:08,261 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-07-13 19:42:08,261 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.7 percent of original size [2021-07-13 19:42:08,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:42:08,263 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:601, output treesize:222 [2021-07-13 19:42:08,381 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:42:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:08,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371193401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:08,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:08,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:08,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973552733] [2021-07-13 19:42:08,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:08,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:08,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:08,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:08,561 INFO L87 Difference]: Start difference. First operand 645 states and 2111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:09,277 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:42:09,488 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 19:42:09,677 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-07-13 19:42:09,872 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 19:42:10,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:10,189 INFO L93 Difference]: Finished difference Result 1125 states and 3321 transitions. [2021-07-13 19:42:10,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:42:10,189 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:10,191 INFO L225 Difference]: With dead ends: 1125 [2021-07-13 19:42:10,191 INFO L226 Difference]: Without dead ends: 1082 [2021-07-13 19:42:10,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1730.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:42:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-07-13 19:42:10,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 644. [2021-07-13 19:42:10,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 643 states have (on average 3.2674961119751167) internal successors, (2101), 643 states have internal predecessors, (2101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 2101 transitions. [2021-07-13 19:42:10,201 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 2101 transitions. Word has length 19 [2021-07-13 19:42:10,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:10,201 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 2101 transitions. [2021-07-13 19:42:10,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:10,201 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 2101 transitions. [2021-07-13 19:42:10,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:10,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:10,202 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:10,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1880 [2021-07-13 19:42:10,402 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:10,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1009794104, now seen corresponding path program 104 times [2021-07-13 19:42:10,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:10,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038669915] [2021-07-13 19:42:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:10,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038669915] [2021-07-13 19:42:10,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038669915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157508959] [2021-07-13 19:42:10,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:10,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:10,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:10,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:10,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:10,804 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:10,809 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:10,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:10,817 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:10,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,824 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:10,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:10,828 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:10,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:10,836 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:10,840 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:10,898 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:42:10,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:10,899 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:42:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:10,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157508959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:10,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:10,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-07-13 19:42:10,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522707302] [2021-07-13 19:42:10,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:10,989 INFO L87 Difference]: Start difference. First operand 644 states and 2101 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:11,544 INFO L93 Difference]: Finished difference Result 868 states and 2721 transitions. [2021-07-13 19:42:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:11,544 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:11,546 INFO L225 Difference]: With dead ends: 868 [2021-07-13 19:42:11,551 INFO L226 Difference]: Without dead ends: 853 [2021-07-13 19:42:11,551 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:42:11,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-07-13 19:42:11,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 647. [2021-07-13 19:42:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 3.2755417956656347) internal successors, (2116), 646 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2116 transitions. [2021-07-13 19:42:11,559 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2116 transitions. Word has length 19 [2021-07-13 19:42:11,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:11,559 INFO L482 AbstractCegarLoop]: Abstraction has 647 states and 2116 transitions. [2021-07-13 19:42:11,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:11,559 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2116 transitions. [2021-07-13 19:42:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:11,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:11,560 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1903,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:11,761 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash -258393666, now seen corresponding path program 105 times [2021-07-13 19:42:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:11,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760428389] [2021-07-13 19:42:11,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:11,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760428389] [2021-07-13 19:42:11,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760428389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:11,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923850969] [2021-07-13 19:42:11,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:11,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:11,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,060 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:12,064 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:12,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,077 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:12,081 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:12,085 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:12,093 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:12,097 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,101 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:12,105 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,109 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:12,113 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:12,117 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:12,121 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:12,125 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:12,330 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-07-13 19:42:12,331 INFO L628 ElimStorePlain]: treesize reduction 45, result has 83.1 percent of original size [2021-07-13 19:42:12,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:42:12,333 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-07-13 19:42:12,458 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:42:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923850969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:12,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:12,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:42:12,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576145998] [2021-07-13 19:42:12,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:12,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:12,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:12,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:12,579 INFO L87 Difference]: Start difference. First operand 647 states and 2116 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:13,315 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-07-13 19:42:13,769 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-13 19:42:14,145 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-07-13 19:42:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:14,288 INFO L93 Difference]: Finished difference Result 1215 states and 3655 transitions. [2021-07-13 19:42:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:42:14,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:14,290 INFO L225 Difference]: With dead ends: 1215 [2021-07-13 19:42:14,290 INFO L226 Difference]: Without dead ends: 1125 [2021-07-13 19:42:14,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1687.4ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:42:14,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-07-13 19:42:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 674. [2021-07-13 19:42:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.335809806835067) internal successors, (2245), 673 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2245 transitions. [2021-07-13 19:42:14,300 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2245 transitions. Word has length 19 [2021-07-13 19:42:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:14,300 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2245 transitions. [2021-07-13 19:42:14,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:14,300 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2245 transitions. [2021-07-13 19:42:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:14,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:14,301 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:14,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1921 [2021-07-13 19:42:14,501 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:14,502 INFO L82 PathProgramCache]: Analyzing trace with hash 156959958, now seen corresponding path program 106 times [2021-07-13 19:42:14,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:14,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388095398] [2021-07-13 19:42:14,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:14,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:14,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388095398] [2021-07-13 19:42:14,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388095398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:14,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535718398] [2021-07-13 19:42:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:14,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:14,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:14,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:14,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:14,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:14,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:14,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:14,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:14,850 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:14,855 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:14,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,863 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,868 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:14,873 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:14,877 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:14,882 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:14,886 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:14,891 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:14,895 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:14,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:14,899 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:15,077 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 19:42:15,078 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-07-13 19:42:15,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:42:15,079 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-07-13 19:42:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:15,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535718398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:15,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:15,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:42:15,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327883880] [2021-07-13 19:42:15,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:15,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:15,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:15,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:15,367 INFO L87 Difference]: Start difference. First operand 674 states and 2245 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,136 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 19:42:16,377 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2021-07-13 19:42:16,574 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-07-13 19:42:16,828 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-07-13 19:42:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:16,948 INFO L93 Difference]: Finished difference Result 1157 states and 3515 transitions. [2021-07-13 19:42:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:16,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:16,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:16,950 INFO L225 Difference]: With dead ends: 1157 [2021-07-13 19:42:16,950 INFO L226 Difference]: Without dead ends: 1084 [2021-07-13 19:42:16,950 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1598.0ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:16,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2021-07-13 19:42:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 666. [2021-07-13 19:42:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 3.3142857142857145) internal successors, (2204), 665 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 2204 transitions. [2021-07-13 19:42:16,959 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 2204 transitions. Word has length 19 [2021-07-13 19:42:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:16,959 INFO L482 AbstractCegarLoop]: Abstraction has 666 states and 2204 transitions. [2021-07-13 19:42:16,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 2204 transitions. [2021-07-13 19:42:16,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:16,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:16,960 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:17,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1938,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:17,161 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1691439274, now seen corresponding path program 107 times [2021-07-13 19:42:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23555058] [2021-07-13 19:42:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23555058] [2021-07-13 19:42:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23555058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957250866] [2021-07-13 19:42:17,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:17,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:17,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:17,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:17,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:17,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:42:17,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:42:17,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:49, output treesize:33 [2021-07-13 19:42:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:17,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957250866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:17,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:17,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:42:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605656958] [2021-07-13 19:42:17,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:17,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:17,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:17,598 INFO L87 Difference]: Start difference. First operand 666 states and 2204 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:18,547 INFO L93 Difference]: Finished difference Result 1001 states and 3102 transitions. [2021-07-13 19:42:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:18,548 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:18,549 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:42:18,549 INFO L226 Difference]: Without dead ends: 951 [2021-07-13 19:42:18,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-07-13 19:42:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 672. [2021-07-13 19:42:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-07-13 19:42:18,559 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-07-13 19:42:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:18,559 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-07-13 19:42:18,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-07-13 19:42:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:18,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:18,560 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:18,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1958,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:18,760 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:18,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:18,760 INFO L82 PathProgramCache]: Analyzing trace with hash 251000956, now seen corresponding path program 108 times [2021-07-13 19:42:18,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:18,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577488952] [2021-07-13 19:42:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:18,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:18,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577488952] [2021-07-13 19:42:18,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577488952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:18,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004269298] [2021-07-13 19:42:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:18,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:18,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:19,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:19,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:19,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:19,138 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:19,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:19,145 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:19,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:19,151 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:19,154 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:19,158 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:19,161 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,163 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:19,164 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:19,216 INFO L628 ElimStorePlain]: treesize reduction 27, result has 69.3 percent of original size [2021-07-13 19:42:19,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:19,217 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:42:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:19,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004269298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:19,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:19,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:19,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680058385] [2021-07-13 19:42:19,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:19,335 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:20,157 INFO L93 Difference]: Finished difference Result 1043 states and 3174 transitions. [2021-07-13 19:42:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:20,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:20,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:20,159 INFO L225 Difference]: With dead ends: 1043 [2021-07-13 19:42:20,159 INFO L226 Difference]: Without dead ends: 999 [2021-07-13 19:42:20,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:42:20,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-07-13 19:42:20,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 672. [2021-07-13 19:42:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-07-13 19:42:20,168 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-07-13 19:42:20,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:20,168 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-07-13 19:42:20,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-07-13 19:42:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:20,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:20,169 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:20,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1968 [2021-07-13 19:42:20,370 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 158615530, now seen corresponding path program 109 times [2021-07-13 19:42:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:20,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444577084] [2021-07-13 19:42:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:20,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:20,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444577084] [2021-07-13 19:42:20,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444577084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:20,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630285976] [2021-07-13 19:42:20,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:20,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:20,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:20,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:20,820 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,824 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:20,829 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:20,834 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:20,839 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,844 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:20,848 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:20,852 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,857 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:20,862 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:20,866 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:20,871 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,876 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,881 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:20,886 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,889 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:20,890 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,894 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:20,899 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:20,904 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:20,908 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:20,913 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:20,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:20,917 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:21,141 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 19:42:21,142 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-07-13 19:42:21,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:42:21,144 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-07-13 19:42:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:21,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630285976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:21,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:21,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:42:21,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292417260] [2021-07-13 19:42:21,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:21,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:21,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:21,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:21,394 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,647 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-07-13 19:42:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:22,685 INFO L93 Difference]: Finished difference Result 1195 states and 3544 transitions. [2021-07-13 19:42:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:22,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:22,688 INFO L225 Difference]: With dead ends: 1195 [2021-07-13 19:42:22,688 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:42:22,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1344.5ms TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:22,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:42:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 678. [2021-07-13 19:42:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 3.342688330871492) internal successors, (2263), 677 states have internal predecessors, (2263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2263 transitions. [2021-07-13 19:42:22,699 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2263 transitions. Word has length 19 [2021-07-13 19:42:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:22,699 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 2263 transitions. [2021-07-13 19:42:22,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:22,699 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2263 transitions. [2021-07-13 19:42:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:22,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:22,700 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:22,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1984,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:22,900 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1450957930, now seen corresponding path program 110 times [2021-07-13 19:42:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:22,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357635673] [2021-07-13 19:42:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357635673] [2021-07-13 19:42:23,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357635673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992914030] [2021-07-13 19:42:23,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:23,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:23,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:23,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:23,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:23,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:23,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:23,337 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:23,341 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:23,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:23,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:23,362 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:23,367 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,371 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,375 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:23,379 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:23,383 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:23,387 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:23,391 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:23,553 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-13 19:42:23,553 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-07-13 19:42:23,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:42:23,563 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-07-13 19:42:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992914030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:23,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:23,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:42:23,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997501016] [2021-07-13 19:42:23,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:42:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:42:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:42:23,856 INFO L87 Difference]: Start difference. First operand 678 states and 2263 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:24,484 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 19:42:24,643 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 19:42:24,873 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-07-13 19:42:25,130 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2021-07-13 19:42:25,417 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-07-13 19:42:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:25,578 INFO L93 Difference]: Finished difference Result 1109 states and 3354 transitions. [2021-07-13 19:42:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:25,580 INFO L225 Difference]: With dead ends: 1109 [2021-07-13 19:42:25,580 INFO L226 Difference]: Without dead ends: 1079 [2021-07-13 19:42:25,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1830.9ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:25,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-07-13 19:42:25,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 672. [2021-07-13 19:42:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 3.3278688524590163) internal successors, (2233), 671 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 2233 transitions. [2021-07-13 19:42:25,591 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 2233 transitions. Word has length 19 [2021-07-13 19:42:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:25,591 INFO L482 AbstractCegarLoop]: Abstraction has 672 states and 2233 transitions. [2021-07-13 19:42:25,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 2233 transitions. [2021-07-13 19:42:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:25,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:25,592 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:25,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2001 [2021-07-13 19:42:25,792 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash 228725566, now seen corresponding path program 111 times [2021-07-13 19:42:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:25,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939802051] [2021-07-13 19:42:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:25,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939802051] [2021-07-13 19:42:25,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939802051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:25,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195515852] [2021-07-13 19:42:25,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:25,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:25,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:25,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:25,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:26,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:26,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:26,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:26,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:26,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:26,080 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:26,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:26,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,090 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:26,090 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:26,178 INFO L628 ElimStorePlain]: treesize reduction 31, result has 75.6 percent of original size [2021-07-13 19:42:26,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:42:26,179 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-07-13 19:42:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:26,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195515852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:26,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:26,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:26,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596664211] [2021-07-13 19:42:26,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:26,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:26,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:26,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:26,429 INFO L87 Difference]: Start difference. First operand 672 states and 2233 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:26,918 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 19:42:27,512 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-07-13 19:42:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:27,537 INFO L93 Difference]: Finished difference Result 1335 states and 4006 transitions. [2021-07-13 19:42:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:27,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:27,540 INFO L225 Difference]: With dead ends: 1335 [2021-07-13 19:42:27,540 INFO L226 Difference]: Without dead ends: 1269 [2021-07-13 19:42:27,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1148.1ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-13 19:42:27,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 684. [2021-07-13 19:42:27,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.348462664714495) internal successors, (2287), 683 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2287 transitions. [2021-07-13 19:42:27,551 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2287 transitions. Word has length 19 [2021-07-13 19:42:27,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:27,551 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 2287 transitions. [2021-07-13 19:42:27,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:27,551 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2287 transitions. [2021-07-13 19:42:27,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:27,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:27,552 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:27,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2024 [2021-07-13 19:42:27,753 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:27,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1521067966, now seen corresponding path program 112 times [2021-07-13 19:42:27,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:27,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384462699] [2021-07-13 19:42:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:27,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384462699] [2021-07-13 19:42:27,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384462699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:27,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697723550] [2021-07-13 19:42:27,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:27,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:27,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:27,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:27,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:28,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:28,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:28,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:28,052 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:28,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:28,059 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:28,063 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:28,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:28,069 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:28,154 INFO L628 ElimStorePlain]: treesize reduction 35, result has 73.3 percent of original size [2021-07-13 19:42:28,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:42:28,155 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:96 [2021-07-13 19:42:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:28,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697723550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:28,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:28,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:28,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220990213] [2021-07-13 19:42:28,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:28,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:28,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:28,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:28,447 INFO L87 Difference]: Start difference. First operand 684 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:28,984 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 19:42:29,190 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-07-13 19:42:29,381 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2021-07-13 19:42:29,580 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-07-13 19:42:29,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:29,892 INFO L93 Difference]: Finished difference Result 1330 states and 3994 transitions. [2021-07-13 19:42:29,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:42:29,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:29,895 INFO L225 Difference]: With dead ends: 1330 [2021-07-13 19:42:29,895 INFO L226 Difference]: Without dead ends: 1300 [2021-07-13 19:42:29,895 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1454.3ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:29,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2021-07-13 19:42:29,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 676. [2021-07-13 19:42:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 3.334814814814815) internal successors, (2251), 675 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 2251 transitions. [2021-07-13 19:42:29,906 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 2251 transitions. Word has length 19 [2021-07-13 19:42:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:29,906 INFO L482 AbstractCegarLoop]: Abstraction has 676 states and 2251 transitions. [2021-07-13 19:42:29,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 2251 transitions. [2021-07-13 19:42:29,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:29,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:29,907 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:30,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2041,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:30,108 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1561740112, now seen corresponding path program 113 times [2021-07-13 19:42:30,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:30,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010722270] [2021-07-13 19:42:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:30,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:30,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010722270] [2021-07-13 19:42:30,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010722270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:30,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646324393] [2021-07-13 19:42:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:30,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:30,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:30,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:30,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:30,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:30,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:30,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:30,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:30,402 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:30,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:30,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:30,425 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,428 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:30,428 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:30,432 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:30,520 INFO L628 ElimStorePlain]: treesize reduction 46, result has 69.1 percent of original size [2021-07-13 19:42:30,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:42:30,521 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:310, output treesize:103 [2021-07-13 19:42:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:30,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646324393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:30,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:30,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:42:30,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051049689] [2021-07-13 19:42:30,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:30,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:30,724 INFO L87 Difference]: Start difference. First operand 676 states and 2251 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:31,229 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:42:31,436 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-07-13 19:42:31,607 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-07-13 19:42:31,822 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-07-13 19:42:32,205 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2021-07-13 19:42:32,430 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2021-07-13 19:42:32,727 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2021-07-13 19:42:32,996 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-07-13 19:42:32,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:32,997 INFO L93 Difference]: Finished difference Result 1173 states and 3540 transitions. [2021-07-13 19:42:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:42:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:33,004 INFO L225 Difference]: With dead ends: 1173 [2021-07-13 19:42:33,004 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:42:33,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2252.5ms TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:42:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 673. [2021-07-13 19:42:33,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.3407738095238093) internal successors, (2245), 672 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2245 transitions. [2021-07-13 19:42:33,014 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2245 transitions. Word has length 19 [2021-07-13 19:42:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:33,014 INFO L482 AbstractCegarLoop]: Abstraction has 673 states and 2245 transitions. [2021-07-13 19:42:33,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2245 transitions. [2021-07-13 19:42:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:33,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:33,015 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:33,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-07-13 19:42:33,215 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:33,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:33,216 INFO L82 PathProgramCache]: Analyzing trace with hash -330290710, now seen corresponding path program 114 times [2021-07-13 19:42:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:33,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066565299] [2021-07-13 19:42:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:33,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:33,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066565299] [2021-07-13 19:42:33,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066565299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:33,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558483039] [2021-07-13 19:42:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:33,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:33,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:33,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:33,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:33,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:33,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:33,622 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:42:33,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:33,623 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:42:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558483039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:33,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:33,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:42:33,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357084917] [2021-07-13 19:42:33,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:42:33,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:42:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:42:33,678 INFO L87 Difference]: Start difference. First operand 673 states and 2245 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:34,448 INFO L93 Difference]: Finished difference Result 947 states and 2977 transitions. [2021-07-13 19:42:34,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:34,450 INFO L225 Difference]: With dead ends: 947 [2021-07-13 19:42:34,450 INFO L226 Difference]: Without dead ends: 932 [2021-07-13 19:42:34,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 822.4ms TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:42:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-07-13 19:42:34,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 674. [2021-07-13 19:42:34,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 3.3432392273402676) internal successors, (2250), 673 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2250 transitions. [2021-07-13 19:42:34,459 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2250 transitions. Word has length 19 [2021-07-13 19:42:34,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:34,459 INFO L482 AbstractCegarLoop]: Abstraction has 674 states and 2250 transitions. [2021-07-13 19:42:34,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:34,459 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2250 transitions. [2021-07-13 19:42:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:34,460 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:34,460 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:34,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2085,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:34,660 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:34,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 20330052, now seen corresponding path program 115 times [2021-07-13 19:42:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:34,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053871431] [2021-07-13 19:42:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:34,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:34,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053871431] [2021-07-13 19:42:34,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053871431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:34,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362649215] [2021-07-13 19:42:34,757 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:34,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:34,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:34,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:35,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:35,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:35,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:35,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,015 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:35,015 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:35,019 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:35,021 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:35,025 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:35,106 INFO L628 ElimStorePlain]: treesize reduction 28, result has 77.4 percent of original size [2021-07-13 19:42:35,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-07-13 19:42:35,107 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:243, output treesize:96 [2021-07-13 19:42:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362649215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:35,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:35,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:42:35,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882343979] [2021-07-13 19:42:35,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:42:35,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:42:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:42:35,222 INFO L87 Difference]: Start difference. First operand 674 states and 2250 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:35,889 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 19:42:36,128 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 19:42:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:36,512 INFO L93 Difference]: Finished difference Result 1151 states and 3502 transitions. [2021-07-13 19:42:36,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:42:36,512 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:36,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:36,514 INFO L225 Difference]: With dead ends: 1151 [2021-07-13 19:42:36,514 INFO L226 Difference]: Without dead ends: 1101 [2021-07-13 19:42:36,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1227.9ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-07-13 19:42:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 683. [2021-07-13 19:42:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.341642228739003) internal successors, (2279), 682 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2279 transitions. [2021-07-13 19:42:36,525 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2279 transitions. Word has length 19 [2021-07-13 19:42:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:36,525 INFO L482 AbstractCegarLoop]: Abstraction has 683 states and 2279 transitions. [2021-07-13 19:42:36,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:36,525 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2279 transitions. [2021-07-13 19:42:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:36,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:36,526 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:36,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2099,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,726 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash -52617630, now seen corresponding path program 116 times [2021-07-13 19:42:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:36,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006273889] [2021-07-13 19:42:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:36,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006273889] [2021-07-13 19:42:36,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006273889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:36,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899869667] [2021-07-13 19:42:36,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:36,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:36,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:36,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:36,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:37,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:37,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:37,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:37,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:37,131 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:37,134 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:37,137 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:37,175 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:42:37,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:37,176 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:42:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:37,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899869667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:37,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:37,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:37,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978148589] [2021-07-13 19:42:37,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:37,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:37,228 INFO L87 Difference]: Start difference. First operand 683 states and 2279 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:37,715 INFO L93 Difference]: Finished difference Result 871 states and 2801 transitions. [2021-07-13 19:42:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:37,715 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:37,717 INFO L225 Difference]: With dead ends: 871 [2021-07-13 19:42:37,717 INFO L226 Difference]: Without dead ends: 856 [2021-07-13 19:42:37,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:37,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-07-13 19:42:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 689. [2021-07-13 19:42:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.3401162790697674) internal successors, (2298), 688 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2298 transitions. [2021-07-13 19:42:37,725 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2298 transitions. Word has length 19 [2021-07-13 19:42:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:37,725 INFO L482 AbstractCegarLoop]: Abstraction has 689 states and 2298 transitions. [2021-07-13 19:42:37,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2298 transitions. [2021-07-13 19:42:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:37,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:37,726 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2118,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:37,927 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1493055948, now seen corresponding path program 117 times [2021-07-13 19:42:37,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:37,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321518449] [2021-07-13 19:42:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321518449] [2021-07-13 19:42:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321518449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942350808] [2021-07-13 19:42:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:38,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:38,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:38,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:38,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:38,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:38,283 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:38,286 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:38,290 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:38,293 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:38,296 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:38,300 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:38,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:38,306 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:38,363 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-07-13 19:42:38,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:38,364 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:415, output treesize:61 [2021-07-13 19:42:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:38,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942350808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:38,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:38,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704167812] [2021-07-13 19:42:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:38,477 INFO L87 Difference]: Start difference. First operand 689 states and 2298 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:38,989 INFO L93 Difference]: Finished difference Result 878 states and 2816 transitions. [2021-07-13 19:42:38,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:38,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:38,991 INFO L225 Difference]: With dead ends: 878 [2021-07-13 19:42:38,991 INFO L226 Difference]: Without dead ends: 863 [2021-07-13 19:42:38,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-07-13 19:42:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 686. [2021-07-13 19:42:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-07-13 19:42:39,000 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-07-13 19:42:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:39,000 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-07-13 19:42:39,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-07-13 19:42:39,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:39,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:39,001 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:39,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2128 [2021-07-13 19:42:39,201 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 655740588, now seen corresponding path program 118 times [2021-07-13 19:42:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:39,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846150640] [2021-07-13 19:42:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:39,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:39,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846150640] [2021-07-13 19:42:39,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846150640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142604900] [2021-07-13 19:42:39,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:39,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:39,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:39,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:39,567 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:39,571 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:39,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:39,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:39,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:39,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:39,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:39,638 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-07-13 19:42:39,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:39,639 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-07-13 19:42:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:39,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142604900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:39,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:39,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858839801] [2021-07-13 19:42:39,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:39,736 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:40,521 INFO L93 Difference]: Finished difference Result 1022 states and 3167 transitions. [2021-07-13 19:42:40,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:40,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:40,523 INFO L225 Difference]: With dead ends: 1022 [2021-07-13 19:42:40,523 INFO L226 Difference]: Without dead ends: 1007 [2021-07-13 19:42:40,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 809.1ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:42:40,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-07-13 19:42:40,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 686. [2021-07-13 19:42:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 3.3386861313868614) internal successors, (2287), 685 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 2287 transitions. [2021-07-13 19:42:40,533 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 2287 transitions. Word has length 19 [2021-07-13 19:42:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:40,533 INFO L482 AbstractCegarLoop]: Abstraction has 686 states and 2287 transitions. [2021-07-13 19:42:40,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:40,533 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 2287 transitions. [2021-07-13 19:42:40,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:40,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:40,534 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:40,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2144 [2021-07-13 19:42:40,734 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:40,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:40,735 INFO L82 PathProgramCache]: Analyzing trace with hash -356951944, now seen corresponding path program 119 times [2021-07-13 19:42:40,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:40,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465083191] [2021-07-13 19:42:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:40,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:40,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:40,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465083191] [2021-07-13 19:42:40,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465083191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:40,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914224671] [2021-07-13 19:42:40,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:40,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:42:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:41,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:41,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:41,121 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:41,125 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:41,129 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:41,132 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:41,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:41,140 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:41,143 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:41,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:41,151 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:41,154 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:41,158 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:41,161 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:41,226 INFO L628 ElimStorePlain]: treesize reduction 70, result has 45.7 percent of original size [2021-07-13 19:42:41,227 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:41,227 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:458, output treesize:59 [2021-07-13 19:42:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:41,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914224671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:41,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:41,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:41,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046167823] [2021-07-13 19:42:41,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:41,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:41,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:41,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:41,343 INFO L87 Difference]: Start difference. First operand 686 states and 2287 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:41,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-07-13 19:42:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:42,580 INFO L93 Difference]: Finished difference Result 1128 states and 3408 transitions. [2021-07-13 19:42:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:42:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:42,582 INFO L225 Difference]: With dead ends: 1128 [2021-07-13 19:42:42,582 INFO L226 Difference]: Without dead ends: 1049 [2021-07-13 19:42:42,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1270.6ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:42:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-07-13 19:42:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 698. [2021-07-13 19:42:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 3.340028694404591) internal successors, (2328), 697 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 2328 transitions. [2021-07-13 19:42:42,592 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 2328 transitions. Word has length 19 [2021-07-13 19:42:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:42,592 INFO L482 AbstractCegarLoop]: Abstraction has 698 states and 2328 transitions. [2021-07-13 19:42:42,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 2328 transitions. [2021-07-13 19:42:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:42,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:42,593 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:42,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2161,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:42,793 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash -2094087908, now seen corresponding path program 120 times [2021-07-13 19:42:42,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:42,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659443715] [2021-07-13 19:42:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:42,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659443715] [2021-07-13 19:42:42,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659443715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:42,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900679677] [2021-07-13 19:42:42,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:43,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:43,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:43,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:43,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,264 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:43,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:43,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,276 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,277 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,281 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:43,283 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:43,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:43,326 INFO L628 ElimStorePlain]: treesize reduction 65, result has 39.8 percent of original size [2021-07-13 19:42:43,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:43,327 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:240, output treesize:43 [2021-07-13 19:42:43,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:43,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900679677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:43,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:43,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:43,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031297092] [2021-07-13 19:42:43,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:43,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:43,377 INFO L87 Difference]: Start difference. First operand 698 states and 2328 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:44,020 INFO L93 Difference]: Finished difference Result 905 states and 2904 transitions. [2021-07-13 19:42:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:42:44,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:44,022 INFO L225 Difference]: With dead ends: 905 [2021-07-13 19:42:44,022 INFO L226 Difference]: Without dead ends: 890 [2021-07-13 19:42:44,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:42:44,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-07-13 19:42:44,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 705. [2021-07-13 19:42:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 704 states have (on average 3.3423295454545454) internal successors, (2353), 704 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 2353 transitions. [2021-07-13 19:42:44,032 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 2353 transitions. Word has length 19 [2021-07-13 19:42:44,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:44,032 INFO L482 AbstractCegarLoop]: Abstraction has 705 states and 2353 transitions. [2021-07-13 19:42:44,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:44,032 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 2353 transitions. [2021-07-13 19:42:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:44,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:44,033 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:44,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:44,233 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 760441070, now seen corresponding path program 121 times [2021-07-13 19:42:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:44,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641150194] [2021-07-13 19:42:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:44,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641150194] [2021-07-13 19:42:44,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641150194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401209325] [2021-07-13 19:42:44,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:44,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:44,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:44,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:44,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:44,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:44,684 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:44,687 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:44,692 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:44,695 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:44,699 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:44,703 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:44,707 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:44,711 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:44,714 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:44,718 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:44,786 INFO L628 ElimStorePlain]: treesize reduction 55, result has 54.9 percent of original size [2021-07-13 19:42:44,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:44,787 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:478, output treesize:67 [2021-07-13 19:42:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:44,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401209325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:44,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:44,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098851351] [2021-07-13 19:42:44,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:44,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:44,891 INFO L87 Difference]: Start difference. First operand 705 states and 2353 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:45,583 INFO L93 Difference]: Finished difference Result 967 states and 3033 transitions. [2021-07-13 19:42:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:45,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:45,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:45,585 INFO L225 Difference]: With dead ends: 967 [2021-07-13 19:42:45,585 INFO L226 Difference]: Without dead ends: 924 [2021-07-13 19:42:45,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:42:45,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-07-13 19:42:45,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 708. [2021-07-13 19:42:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-07-13 19:42:45,594 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-07-13 19:42:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:45,594 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-07-13 19:42:45,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-07-13 19:42:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:45,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:45,595 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:45,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2193,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,795 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:45,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1385729690, now seen corresponding path program 122 times [2021-07-13 19:42:45,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:45,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208985957] [2021-07-13 19:42:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:45,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:45,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208985957] [2021-07-13 19:42:45,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208985957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:45,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195465562] [2021-07-13 19:42:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:45,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:45,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:46,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:46,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:46,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:46,158 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:46,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:46,165 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,168 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:46,168 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:46,171 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,174 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:46,175 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:46,178 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:46,181 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:46,184 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:46,245 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-07-13 19:42:46,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:46,246 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-07-13 19:42:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:46,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195465562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:46,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:46,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:46,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185620602] [2021-07-13 19:42:46,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:46,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:46,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:46,334 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:46,886 INFO L93 Difference]: Finished difference Result 934 states and 2969 transitions. [2021-07-13 19:42:46,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:46,888 INFO L225 Difference]: With dead ends: 934 [2021-07-13 19:42:46,888 INFO L226 Difference]: Without dead ends: 919 [2021-07-13 19:42:46,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 641.1ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:42:46,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-07-13 19:42:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 708. [2021-07-13 19:42:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.3394625176803396) internal successors, (2361), 707 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2361 transitions. [2021-07-13 19:42:46,897 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2361 transitions. Word has length 19 [2021-07-13 19:42:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:46,897 INFO L482 AbstractCegarLoop]: Abstraction has 708 states and 2361 transitions. [2021-07-13 19:42:46,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2361 transitions. [2021-07-13 19:42:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:46,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:46,898 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:47,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2209 [2021-07-13 19:42:47,099 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash -275510810, now seen corresponding path program 123 times [2021-07-13 19:42:47,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:47,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828508416] [2021-07-13 19:42:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:47,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828508416] [2021-07-13 19:42:47,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828508416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079827300] [2021-07-13 19:42:47,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:47,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:42:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:47,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:47,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:47,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:42:47,557 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:47,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:47,593 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-07-13 19:42:47,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:47,594 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:100, output treesize:43 [2021-07-13 19:42:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:47,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079827300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:47,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:47,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:47,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875388649] [2021-07-13 19:42:47,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:47,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:47,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:47,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:47,667 INFO L87 Difference]: Start difference. First operand 708 states and 2361 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:48,306 INFO L93 Difference]: Finished difference Result 916 states and 2941 transitions. [2021-07-13 19:42:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:48,308 INFO L225 Difference]: With dead ends: 916 [2021-07-13 19:42:48,308 INFO L226 Difference]: Without dead ends: 901 [2021-07-13 19:42:48,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 756.8ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:42:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-07-13 19:42:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 714. [2021-07-13 19:42:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-07-13 19:42:48,317 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-07-13 19:42:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:48,317 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-07-13 19:42:48,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-07-13 19:42:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:48,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:48,318 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:48,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2230,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:48,519 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1715949128, now seen corresponding path program 124 times [2021-07-13 19:42:48,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:48,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718555360] [2021-07-13 19:42:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:48,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:48,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718555360] [2021-07-13 19:42:48,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718555360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:48,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578579135] [2021-07-13 19:42:48,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:48,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:42:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:48,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:48,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:48,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:48,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:48,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,947 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:48,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:48,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:48,957 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:48,962 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:48,966 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:48,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:48,971 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:49,048 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-07-13 19:42:49,049 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:49,050 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:42:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:49,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578579135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:49,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:49,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302096927] [2021-07-13 19:42:49,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:49,171 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:49,661 INFO L93 Difference]: Finished difference Result 971 states and 3048 transitions. [2021-07-13 19:42:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:42:49,662 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:49,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:49,663 INFO L225 Difference]: With dead ends: 971 [2021-07-13 19:42:49,663 INFO L226 Difference]: Without dead ends: 928 [2021-07-13 19:42:49,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2021-07-13 19:42:49,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 714. [2021-07-13 19:42:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.347826086956522) internal successors, (2387), 713 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2387 transitions. [2021-07-13 19:42:49,678 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2387 transitions. Word has length 19 [2021-07-13 19:42:49,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:49,678 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2387 transitions. [2021-07-13 19:42:49,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:49,678 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2387 transitions. [2021-07-13 19:42:49,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:49,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:49,679 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:49,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2243 [2021-07-13 19:42:49,880 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:49,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:49,880 INFO L82 PathProgramCache]: Analyzing trace with hash 907255270, now seen corresponding path program 125 times [2021-07-13 19:42:49,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:49,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816489607] [2021-07-13 19:42:49,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816489607] [2021-07-13 19:42:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816489607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128754937] [2021-07-13 19:42:50,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:50,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:50,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:50,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:50,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:50,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:50,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:50,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:50,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:50,282 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:50,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:50,293 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:50,295 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:50,298 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:50,346 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-07-13 19:42:50,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:50,347 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:242, output treesize:55 [2021-07-13 19:42:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:50,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128754937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:50,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:50,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:50,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126069072] [2021-07-13 19:42:50,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:50,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:50,433 INFO L87 Difference]: Start difference. First operand 714 states and 2387 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:50,956 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-07-13 19:42:51,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:51,123 INFO L93 Difference]: Finished difference Result 913 states and 2929 transitions. [2021-07-13 19:42:51,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:42:51,123 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:51,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:51,125 INFO L225 Difference]: With dead ends: 913 [2021-07-13 19:42:51,125 INFO L226 Difference]: Without dead ends: 898 [2021-07-13 19:42:51,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 800.3ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:51,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2021-07-13 19:42:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 712. [2021-07-13 19:42:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-07-13 19:42:51,134 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-07-13 19:42:51,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:51,134 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-07-13 19:42:51,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:51,134 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-07-13 19:42:51,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:51,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:51,135 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:51,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2263,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:51,336 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:51,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:51,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1808334554, now seen corresponding path program 126 times [2021-07-13 19:42:51,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:51,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091308604] [2021-07-13 19:42:51,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:51,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:51,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091308604] [2021-07-13 19:42:51,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091308604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:51,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167093511] [2021-07-13 19:42:51,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:51,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:42:51,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:51,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:51,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:51,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:51,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:51,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:51,777 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:51,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:51,788 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:51,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:51,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:51,810 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:51,814 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,818 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,819 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:51,823 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:51,828 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:42:51,837 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,841 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:51,845 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,849 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,854 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,858 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,862 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,867 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:51,871 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,875 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:51,880 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,884 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:51,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:51,887 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:52,061 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-07-13 19:42:52,061 INFO L628 ElimStorePlain]: treesize reduction 291, result has 38.1 percent of original size [2021-07-13 19:42:52,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:42:52,063 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 1 variables, input treesize:1167, output treesize:179 [2021-07-13 19:42:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167093511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:52,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:52,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:52,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591339871] [2021-07-13 19:42:52,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:52,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:52,285 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:52,820 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-07-13 19:42:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:53,042 INFO L93 Difference]: Finished difference Result 973 states and 3089 transitions. [2021-07-13 19:42:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:53,045 INFO L225 Difference]: With dead ends: 973 [2021-07-13 19:42:53,045 INFO L226 Difference]: Without dead ends: 958 [2021-07-13 19:42:53,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:42:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-07-13 19:42:53,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 715. [2021-07-13 19:42:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-07-13 19:42:53,061 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-07-13 19:42:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:53,061 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-07-13 19:42:53,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-07-13 19:42:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:53,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:53,062 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:53,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2280,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:53,262 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -515992154, now seen corresponding path program 127 times [2021-07-13 19:42:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:53,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166185263] [2021-07-13 19:42:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:53,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:53,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166185263] [2021-07-13 19:42:53,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166185263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:53,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620116985] [2021-07-13 19:42:53,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:42:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:53,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:53,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:53,656 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:53,666 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,676 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:53,681 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,685 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:53,691 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:53,695 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,699 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,700 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,704 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:53,709 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,713 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,718 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,723 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,727 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:53,732 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:53,736 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:53,740 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,744 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:53,748 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:53,966 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:42:53,967 INFO L628 ElimStorePlain]: treesize reduction 103, result has 68.3 percent of original size [2021-07-13 19:42:53,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:42:53,969 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1063, output treesize:222 [2021-07-13 19:42:54,086 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:42:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:54,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620116985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:54,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:54,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:54,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554308288] [2021-07-13 19:42:54,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:54,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:54,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:54,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:54,262 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:54,748 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-07-13 19:42:54,968 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-07-13 19:42:55,276 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2021-07-13 19:42:55,673 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-07-13 19:42:55,837 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-07-13 19:42:56,232 WARN L205 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-07-13 19:42:56,445 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-07-13 19:42:56,729 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 19:42:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:56,776 INFO L93 Difference]: Finished difference Result 974 states and 3073 transitions. [2021-07-13 19:42:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:42:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:56,777 INFO L225 Difference]: With dead ends: 974 [2021-07-13 19:42:56,777 INFO L226 Difference]: Without dead ends: 952 [2021-07-13 19:42:56,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2654.5ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:42:56,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-07-13 19:42:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 712. [2021-07-13 19:42:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 3.3445850914205346) internal successors, (2378), 711 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 2378 transitions. [2021-07-13 19:42:56,787 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 2378 transitions. Word has length 19 [2021-07-13 19:42:56,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:56,787 INFO L482 AbstractCegarLoop]: Abstraction has 712 states and 2378 transitions. [2021-07-13 19:42:56,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 2378 transitions. [2021-07-13 19:42:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:56,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:56,788 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:56,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-07-13 19:42:56,988 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 45289400, now seen corresponding path program 128 times [2021-07-13 19:42:56,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:56,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935655182] [2021-07-13 19:42:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935655182] [2021-07-13 19:42:57,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935655182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852312567] [2021-07-13 19:42:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:57,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:42:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:57,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:57,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:57,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:57,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:57,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,407 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:57,408 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:57,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:57,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:57,418 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:57,421 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:57,471 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-07-13 19:42:57,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:42:57,473 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:291, output treesize:61 [2021-07-13 19:42:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:57,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852312567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:57,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:57,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:57,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416859760] [2021-07-13 19:42:57,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:57,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:57,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:57,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:57,578 INFO L87 Difference]: Start difference. First operand 712 states and 2378 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:58,093 INFO L93 Difference]: Finished difference Result 1031 states and 3231 transitions. [2021-07-13 19:42:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:42:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:58,095 INFO L225 Difference]: With dead ends: 1031 [2021-07-13 19:42:58,095 INFO L226 Difference]: Without dead ends: 1016 [2021-07-13 19:42:58,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:42:58,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-07-13 19:42:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 715. [2021-07-13 19:42:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 3.3515406162464987) internal successors, (2393), 714 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 2393 transitions. [2021-07-13 19:42:58,111 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 2393 transitions. Word has length 19 [2021-07-13 19:42:58,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:58,111 INFO L482 AbstractCegarLoop]: Abstraction has 715 states and 2393 transitions. [2021-07-13 19:42:58,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:58,111 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 2393 transitions. [2021-07-13 19:42:58,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:58,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:58,112 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:42:58,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2322,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,312 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:42:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:42:58,313 INFO L82 PathProgramCache]: Analyzing trace with hash 796689838, now seen corresponding path program 129 times [2021-07-13 19:42:58,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:42:58,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005291775] [2021-07-13 19:42:58,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:42:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:42:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:58,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:42:58,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005291775] [2021-07-13 19:42:58,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005291775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:58,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987747447] [2021-07-13 19:42:58,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:42:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:42:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:42:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:42:58,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:42:58,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:58,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:58,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:58,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,668 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:58,673 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:58,677 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:58,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,685 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:58,690 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:58,695 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:58,699 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,702 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,702 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:42:58,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,710 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,711 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,715 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:42:58,719 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,723 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:42:58,727 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:42:58,730 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,734 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:42:58,738 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:42:58,741 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:42:58,900 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:42:58,900 INFO L628 ElimStorePlain]: treesize reduction 64, result has 74.2 percent of original size [2021-07-13 19:42:58,902 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:42:58,902 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:927, output treesize:184 [2021-07-13 19:42:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:42:59,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987747447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:42:59,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:42:59,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:42:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379111998] [2021-07-13 19:42:59,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:42:59,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:42:59,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:42:59,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:42:59,106 INFO L87 Difference]: Start difference. First operand 715 states and 2393 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,694 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 19:42:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:42:59,926 INFO L93 Difference]: Finished difference Result 963 states and 3076 transitions. [2021-07-13 19:42:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:42:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:42:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:42:59,928 INFO L225 Difference]: With dead ends: 963 [2021-07-13 19:42:59,928 INFO L226 Difference]: Without dead ends: 948 [2021-07-13 19:42:59,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 943.0ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:42:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2021-07-13 19:42:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 718. [2021-07-13 19:42:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 3.3584379358437935) internal successors, (2408), 717 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2408 transitions. [2021-07-13 19:42:59,937 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2408 transitions. Word has length 19 [2021-07-13 19:42:59,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:42:59,937 INFO L482 AbstractCegarLoop]: Abstraction has 718 states and 2408 transitions. [2021-07-13 19:42:59,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:42:59,937 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2408 transitions. [2021-07-13 19:42:59,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:42:59,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:42:59,938 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:00,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2340,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,138 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:00,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1873939690, now seen corresponding path program 130 times [2021-07-13 19:43:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:00,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271067885] [2021-07-13 19:43:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271067885] [2021-07-13 19:43:00,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271067885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833720399] [2021-07-13 19:43:00,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:00,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:00,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:00,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:00,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:00,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:00,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:00,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:00,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:00,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:00,528 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:00,533 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:00,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:00,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,544 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:00,544 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:00,548 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:00,553 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:00,557 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:00,561 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,564 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:00,564 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:00,568 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:00,572 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:00,576 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:00,580 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:00,748 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:43:00,749 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-07-13 19:43:00,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:00,750 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:731, output treesize:183 [2021-07-13 19:43:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:00,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833720399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:00,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:00,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:00,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44976989] [2021-07-13 19:43:00,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:00,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:00,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:00,984 INFO L87 Difference]: Start difference. First operand 718 states and 2408 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,579 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-07-13 19:43:01,741 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-07-13 19:43:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:01,903 INFO L93 Difference]: Finished difference Result 930 states and 2995 transitions. [2021-07-13 19:43:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:01,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:01,905 INFO L225 Difference]: With dead ends: 930 [2021-07-13 19:43:01,905 INFO L226 Difference]: Without dead ends: 915 [2021-07-13 19:43:01,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1073.2ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:01,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-07-13 19:43:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 713. [2021-07-13 19:43:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.348314606741573) internal successors, (2384), 712 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2384 transitions. [2021-07-13 19:43:01,914 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2384 transitions. Word has length 19 [2021-07-13 19:43:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:01,914 INFO L482 AbstractCegarLoop]: Abstraction has 713 states and 2384 transitions. [2021-07-13 19:43:01,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2384 transitions. [2021-07-13 19:43:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:01,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:01,915 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:02,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2362,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,115 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:02,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:02,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1054966886, now seen corresponding path program 131 times [2021-07-13 19:43:02,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:02,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782338270] [2021-07-13 19:43:02,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782338270] [2021-07-13 19:43:02,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782338270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604683296] [2021-07-13 19:43:02,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:02,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:02,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:02,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:02,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:02,482 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:02,486 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:02,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:02,493 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:02,496 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:02,499 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:02,502 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:02,506 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:02,509 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:02,512 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:02,564 INFO L628 ElimStorePlain]: treesize reduction 30, result has 67.0 percent of original size [2021-07-13 19:43:02,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:02,565 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:409, output treesize:61 [2021-07-13 19:43:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604683296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:02,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:02,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969745926] [2021-07-13 19:43:02,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:02,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:02,654 INFO L87 Difference]: Start difference. First operand 713 states and 2384 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:03,631 INFO L93 Difference]: Finished difference Result 1160 states and 3639 transitions. [2021-07-13 19:43:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:03,634 INFO L225 Difference]: With dead ends: 1160 [2021-07-13 19:43:03,634 INFO L226 Difference]: Without dead ends: 1145 [2021-07-13 19:43:03,634 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1005.5ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:43:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-13 19:43:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 719. [2021-07-13 19:43:03,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 718 states have (on average 3.352367688022284) internal successors, (2407), 718 states have internal predecessors, (2407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 2407 transitions. [2021-07-13 19:43:03,645 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 2407 transitions. Word has length 19 [2021-07-13 19:43:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:03,645 INFO L482 AbstractCegarLoop]: Abstraction has 719 states and 2407 transitions. [2021-07-13 19:43:03,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 2407 transitions. [2021-07-13 19:43:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:03,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:03,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:03,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:03,846 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:03,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:03,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1227644308, now seen corresponding path program 132 times [2021-07-13 19:43:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:03,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177857605] [2021-07-13 19:43:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:03,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:03,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177857605] [2021-07-13 19:43:03,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177857605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:03,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397344714] [2021-07-13 19:43:03,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:04,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:04,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:04,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:04,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:04,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:04,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:04,249 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:04,252 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:04,256 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:04,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:04,262 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:04,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:04,269 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:04,272 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:04,275 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:04,278 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:04,333 INFO L628 ElimStorePlain]: treesize reduction 56, result has 52.1 percent of original size [2021-07-13 19:43:04,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:04,334 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:436, output treesize:61 [2021-07-13 19:43:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:04,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397344714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:04,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:04,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:04,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397276573] [2021-07-13 19:43:04,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:04,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:04,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:04,431 INFO L87 Difference]: Start difference. First operand 719 states and 2407 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,183 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-07-13 19:43:05,519 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-07-13 19:43:05,680 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2021-07-13 19:43:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:05,709 INFO L93 Difference]: Finished difference Result 1114 states and 3533 transitions. [2021-07-13 19:43:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:05,711 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:43:05,711 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:43:05,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1305.9ms TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:43:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:43:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 722. [2021-07-13 19:43:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.3592233009708736) internal successors, (2422), 721 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2422 transitions. [2021-07-13 19:43:05,722 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2422 transitions. Word has length 19 [2021-07-13 19:43:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:05,722 INFO L482 AbstractCegarLoop]: Abstraction has 722 states and 2422 transitions. [2021-07-13 19:43:05,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2422 transitions. [2021-07-13 19:43:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:05,723 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:05,723 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:05,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2406,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:05,923 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:05,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash -476243870, now seen corresponding path program 133 times [2021-07-13 19:43:05,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:05,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226804062] [2021-07-13 19:43:05,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226804062] [2021-07-13 19:43:06,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226804062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966599545] [2021-07-13 19:43:06,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:06,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:06,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:06,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:06,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:06,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:06,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:06,343 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:06,347 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:06,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:06,355 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:06,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:06,364 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:06,368 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:06,372 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:06,376 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:06,541 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-07-13 19:43:06,542 INFO L628 ElimStorePlain]: treesize reduction 68, result has 72.9 percent of original size [2021-07-13 19:43:06,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:06,543 INFO L247 ElimStorePlain]: Needed 15 recursive calls to eliminate 1 variables, input treesize:559, output treesize:183 [2021-07-13 19:43:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:06,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966599545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:06,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:06,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:06,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856104820] [2021-07-13 19:43:06,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:06,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:06,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:06,747 INFO L87 Difference]: Start difference. First operand 722 states and 2422 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,118 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-13 19:43:07,397 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-07-13 19:43:07,560 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2021-07-13 19:43:07,705 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2021-07-13 19:43:07,899 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2021-07-13 19:43:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:07,909 INFO L93 Difference]: Finished difference Result 1089 states and 3469 transitions. [2021-07-13 19:43:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:07,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:07,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:07,912 INFO L225 Difference]: With dead ends: 1089 [2021-07-13 19:43:07,912 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:43:07,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1302.5ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:43:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 727. [2021-07-13 19:43:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.369146005509642) internal successors, (2446), 726 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2446 transitions. [2021-07-13 19:43:07,922 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2446 transitions. Word has length 19 [2021-07-13 19:43:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:07,922 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2446 transitions. [2021-07-13 19:43:07,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2446 transitions. [2021-07-13 19:43:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:07,923 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:07,923 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:08,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-07-13 19:43:08,124 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:08,124 INFO L82 PathProgramCache]: Analyzing trace with hash 816098530, now seen corresponding path program 134 times [2021-07-13 19:43:08,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:08,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201160806] [2021-07-13 19:43:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:08,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201160806] [2021-07-13 19:43:08,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201160806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314751305] [2021-07-13 19:43:08,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:08,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:08,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:08,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:08,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:08,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:08,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:08,525 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:08,529 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:08,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:08,537 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:08,541 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:08,545 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:08,549 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:08,553 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:08,557 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:08,561 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:08,565 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:08,569 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:08,573 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:08,577 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:08,581 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:08,747 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-07-13 19:43:08,747 INFO L628 ElimStorePlain]: treesize reduction 178, result has 50.7 percent of original size [2021-07-13 19:43:08,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:08,749 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:633, output treesize:183 [2021-07-13 19:43:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:08,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314751305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:08,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:08,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:08,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943838187] [2021-07-13 19:43:08,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:08,999 INFO L87 Difference]: Start difference. First operand 727 states and 2446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:09,382 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-07-13 19:43:09,691 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2021-07-13 19:43:09,997 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-07-13 19:43:10,251 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-07-13 19:43:10,488 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-07-13 19:43:10,745 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-07-13 19:43:10,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:10,816 INFO L93 Difference]: Finished difference Result 1068 states and 3409 transitions. [2021-07-13 19:43:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:10,817 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:10,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:10,819 INFO L225 Difference]: With dead ends: 1068 [2021-07-13 19:43:10,819 INFO L226 Difference]: Without dead ends: 1053 [2021-07-13 19:43:10,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1932.5ms TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-07-13 19:43:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 717. [2021-07-13 19:43:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.35195530726257) internal successors, (2400), 716 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2400 transitions. [2021-07-13 19:43:10,833 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2400 transitions. Word has length 19 [2021-07-13 19:43:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:10,833 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 2400 transitions. [2021-07-13 19:43:10,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2400 transitions. [2021-07-13 19:43:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:10,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:10,835 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:11,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2442 [2021-07-13 19:43:11,049 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:11,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1663386532, now seen corresponding path program 135 times [2021-07-13 19:43:11,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:11,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359718702] [2021-07-13 19:43:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:11,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359718702] [2021-07-13 19:43:11,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359718702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907350841] [2021-07-13 19:43:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:11,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:11,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:11,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:11,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:11,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:11,421 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:11,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:11,428 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:11,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:11,434 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:11,471 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:43:11,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:11,471 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:43:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:11,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907350841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:11,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:11,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:11,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157273138] [2021-07-13 19:43:11,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:11,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:11,518 INFO L87 Difference]: Start difference. First operand 717 states and 2400 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:11,985 INFO L93 Difference]: Finished difference Result 894 states and 2875 transitions. [2021-07-13 19:43:11,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:11,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:11,987 INFO L225 Difference]: With dead ends: 894 [2021-07-13 19:43:11,987 INFO L226 Difference]: Without dead ends: 879 [2021-07-13 19:43:11,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:43:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2021-07-13 19:43:11,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 723. [2021-07-13 19:43:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.350415512465374) internal successors, (2419), 722 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2419 transitions. [2021-07-13 19:43:11,996 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2419 transitions. Word has length 19 [2021-07-13 19:43:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:11,996 INFO L482 AbstractCegarLoop]: Abstraction has 723 states and 2419 transitions. [2021-07-13 19:43:11,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:11,996 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2419 transitions. [2021-07-13 19:43:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:11,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:11,997 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:12,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2462,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,198 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:12,198 INFO L82 PathProgramCache]: Analyzing trace with hash 222948214, now seen corresponding path program 136 times [2021-07-13 19:43:12,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:12,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779244650] [2021-07-13 19:43:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:12,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779244650] [2021-07-13 19:43:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779244650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040265833] [2021-07-13 19:43:12,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:12,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:12,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:12,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:12,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:12,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:12,564 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:12,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:12,571 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:12,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:12,578 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:12,582 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:12,585 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:12,588 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:12,652 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-07-13 19:43:12,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:12,653 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:43:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:12,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040265833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:12,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:12,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:12,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631012013] [2021-07-13 19:43:12,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:12,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:12,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:12,759 INFO L87 Difference]: Start difference. First operand 723 states and 2419 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:13,342 INFO L93 Difference]: Finished difference Result 901 states and 2877 transitions. [2021-07-13 19:43:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:13,344 INFO L225 Difference]: With dead ends: 901 [2021-07-13 19:43:13,344 INFO L226 Difference]: Without dead ends: 873 [2021-07-13 19:43:13,345 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:13,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-07-13 19:43:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 726. [2021-07-13 19:43:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.3475862068965516) internal successors, (2427), 725 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2427 transitions. [2021-07-13 19:43:13,353 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2427 transitions. Word has length 19 [2021-07-13 19:43:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:13,353 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2427 transitions. [2021-07-13 19:43:13,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:13,354 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2427 transitions. [2021-07-13 19:43:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:13,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:13,354 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:13,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2472 [2021-07-13 19:43:13,555 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1923222546, now seen corresponding path program 137 times [2021-07-13 19:43:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:13,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914736269] [2021-07-13 19:43:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:13,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914736269] [2021-07-13 19:43:13,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914736269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:13,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586531619] [2021-07-13 19:43:13,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:13,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:13,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:13,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:13,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:13,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:13,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:13,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:13,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:13,910 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:13,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:13,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:13,972 INFO L628 ElimStorePlain]: treesize reduction 4, result has 93.7 percent of original size [2021-07-13 19:43:13,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:13,973 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:238, output treesize:59 [2021-07-13 19:43:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:14,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586531619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:14,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:14,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:14,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860149113] [2021-07-13 19:43:14,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:14,073 INFO L87 Difference]: Start difference. First operand 726 states and 2427 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:14,783 INFO L93 Difference]: Finished difference Result 1058 states and 3256 transitions. [2021-07-13 19:43:14,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:43:14,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:14,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:14,785 INFO L225 Difference]: With dead ends: 1058 [2021-07-13 19:43:14,785 INFO L226 Difference]: Without dead ends: 1000 [2021-07-13 19:43:14,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:14,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-07-13 19:43:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 735. [2021-07-13 19:43:14,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 3.35149863760218) internal successors, (2460), 734 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 2460 transitions. [2021-07-13 19:43:14,795 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 2460 transitions. Word has length 19 [2021-07-13 19:43:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:14,795 INFO L482 AbstractCegarLoop]: Abstraction has 735 states and 2460 transitions. [2021-07-13 19:43:14,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 2460 transitions. [2021-07-13 19:43:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:14,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:14,796 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:14,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2488 [2021-07-13 19:43:14,997 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:14,997 INFO L82 PathProgramCache]: Analyzing trace with hash -813003666, now seen corresponding path program 138 times [2021-07-13 19:43:14,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:14,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164091780] [2021-07-13 19:43:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164091780] [2021-07-13 19:43:15,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164091780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187939982] [2021-07-13 19:43:15,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:15,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:15,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:15,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:15,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:15,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:15,405 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:15,414 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:15,417 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:15,420 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:15,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:15,461 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:43:15,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:15,462 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:43:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:15,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187939982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:15,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:15,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:15,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504293706] [2021-07-13 19:43:15,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:15,524 INFO L87 Difference]: Start difference. First operand 735 states and 2460 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:16,080 INFO L93 Difference]: Finished difference Result 950 states and 3036 transitions. [2021-07-13 19:43:16,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:16,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:16,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:16,082 INFO L225 Difference]: With dead ends: 950 [2021-07-13 19:43:16,082 INFO L226 Difference]: Without dead ends: 935 [2021-07-13 19:43:16,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2021-07-13 19:43:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 741. [2021-07-13 19:43:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.3594594594594596) internal successors, (2486), 740 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2486 transitions. [2021-07-13 19:43:16,092 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2486 transitions. Word has length 19 [2021-07-13 19:43:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:16,092 INFO L482 AbstractCegarLoop]: Abstraction has 741 states and 2486 transitions. [2021-07-13 19:43:16,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2486 transitions. [2021-07-13 19:43:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:16,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:16,093 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:16,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2506,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,293 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:16,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:16,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2041525312, now seen corresponding path program 139 times [2021-07-13 19:43:16,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:16,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979425846] [2021-07-13 19:43:16,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979425846] [2021-07-13 19:43:16,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979425846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677226820] [2021-07-13 19:43:16,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:16,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:16,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:16,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:16,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:16,755 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:16,758 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:16,762 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:16,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:16,769 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:16,772 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:16,856 INFO L628 ElimStorePlain]: treesize reduction 54, result has 55.4 percent of original size [2021-07-13 19:43:16,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:16,857 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:43:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677226820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:16,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:16,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604297519] [2021-07-13 19:43:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:16,963 INFO L87 Difference]: Start difference. First operand 741 states and 2486 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:17,599 INFO L93 Difference]: Finished difference Result 952 states and 3034 transitions. [2021-07-13 19:43:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:17,601 INFO L225 Difference]: With dead ends: 952 [2021-07-13 19:43:17,601 INFO L226 Difference]: Without dead ends: 924 [2021-07-13 19:43:17,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 753.9ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-07-13 19:43:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 738. [2021-07-13 19:43:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 3.3582089552238807) internal successors, (2475), 737 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 2475 transitions. [2021-07-13 19:43:17,617 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 2475 transitions. Word has length 19 [2021-07-13 19:43:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:17,617 INFO L482 AbstractCegarLoop]: Abstraction has 738 states and 2475 transitions. [2021-07-13 19:43:17,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 2475 transitions. [2021-07-13 19:43:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:17,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:17,618 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:17,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2516 [2021-07-13 19:43:17,818 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:17,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:17,819 INFO L82 PathProgramCache]: Analyzing trace with hash 369762414, now seen corresponding path program 140 times [2021-07-13 19:43:17,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:17,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594825625] [2021-07-13 19:43:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594825625] [2021-07-13 19:43:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594825625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834491339] [2021-07-13 19:43:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:18,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:18,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:18,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:18,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:18,261 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:18,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:18,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:18,274 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,278 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:18,282 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,286 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:18,291 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:18,295 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:18,299 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:18,393 INFO L628 ElimStorePlain]: treesize reduction 105, result has 45.9 percent of original size [2021-07-13 19:43:18,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:18,395 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:328, output treesize:89 [2021-07-13 19:43:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:18,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834491339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:18,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:18,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:18,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731550240] [2021-07-13 19:43:18,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:18,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:18,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:18,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:18,527 INFO L87 Difference]: Start difference. First operand 738 states and 2475 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:19,219 INFO L93 Difference]: Finished difference Result 1001 states and 3153 transitions. [2021-07-13 19:43:19,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:19,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:19,221 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:43:19,221 INFO L226 Difference]: Without dead ends: 986 [2021-07-13 19:43:19,221 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 773.4ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-13 19:43:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 740. [2021-07-13 19:43:19,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.3612990527740187) internal successors, (2484), 739 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2484 transitions. [2021-07-13 19:43:19,230 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2484 transitions. Word has length 19 [2021-07-13 19:43:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:19,230 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2484 transitions. [2021-07-13 19:43:19,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2484 transitions. [2021-07-13 19:43:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:19,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:19,231 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:19,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2532,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,432 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:19,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:19,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1587374542, now seen corresponding path program 141 times [2021-07-13 19:43:19,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:19,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231059648] [2021-07-13 19:43:19,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:19,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:19,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231059648] [2021-07-13 19:43:19,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231059648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:19,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665802535] [2021-07-13 19:43:19,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:19,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:19,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:19,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:19,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:19,847 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:19,851 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:19,854 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:19,858 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,861 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:19,862 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:19,865 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:19,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:19,872 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:19,876 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:19,958 INFO L628 ElimStorePlain]: treesize reduction 78, result has 53.3 percent of original size [2021-07-13 19:43:19,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:19,959 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:325, output treesize:89 [2021-07-13 19:43:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:20,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665802535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:20,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:20,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:20,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006192531] [2021-07-13 19:43:20,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:20,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:20,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:20,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:20,069 INFO L87 Difference]: Start difference. First operand 740 states and 2484 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,555 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-07-13 19:43:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:20,846 INFO L93 Difference]: Finished difference Result 948 states and 3036 transitions. [2021-07-13 19:43:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:20,847 INFO L225 Difference]: With dead ends: 948 [2021-07-13 19:43:20,847 INFO L226 Difference]: Without dead ends: 933 [2021-07-13 19:43:20,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 854.5ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2021-07-13 19:43:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 736. [2021-07-13 19:43:20,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.3551020408163263) internal successors, (2466), 735 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2466 transitions. [2021-07-13 19:43:20,856 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2466 transitions. Word has length 19 [2021-07-13 19:43:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 736 states and 2466 transitions. [2021-07-13 19:43:20,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2466 transitions. [2021-07-13 19:43:20,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:20,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:20,857 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:21,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2551 [2021-07-13 19:43:21,058 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1949139886, now seen corresponding path program 142 times [2021-07-13 19:43:21,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:21,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452824358] [2021-07-13 19:43:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:21,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:21,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452824358] [2021-07-13 19:43:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452824358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:21,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540933271] [2021-07-13 19:43:21,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:21,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:21,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,463 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:21,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,472 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:21,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:21,482 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:21,487 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,491 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:21,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:21,500 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,504 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:21,509 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:21,513 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:21,517 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,522 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,526 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:21,530 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,533 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:21,534 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,548 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:21,554 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:21,559 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:21,563 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:21,568 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:21,572 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:21,788 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-07-13 19:43:21,789 INFO L628 ElimStorePlain]: treesize reduction 132, result has 62.7 percent of original size [2021-07-13 19:43:21,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:43:21,791 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:1075, output treesize:222 [2021-07-13 19:43:21,909 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:43:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:22,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540933271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:22,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:22,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:22,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667131317] [2021-07-13 19:43:22,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:22,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:22,033 INFO L87 Difference]: Start difference. First operand 736 states and 2466 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,545 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-07-13 19:43:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:22,950 INFO L93 Difference]: Finished difference Result 1117 states and 3435 transitions. [2021-07-13 19:43:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:22,952 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:43:22,952 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:43:22,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 997.4ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:22,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:43:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 742. [2021-07-13 19:43:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 3.3684210526315788) internal successors, (2496), 741 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 2496 transitions. [2021-07-13 19:43:22,962 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 2496 transitions. Word has length 19 [2021-07-13 19:43:22,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:22,962 INFO L482 AbstractCegarLoop]: Abstraction has 742 states and 2496 transitions. [2021-07-13 19:43:22,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:22,962 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 2496 transitions. [2021-07-13 19:43:22,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:22,963 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:22,963 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:23,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2567 [2021-07-13 19:43:23,164 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:23,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1053485010, now seen corresponding path program 143 times [2021-07-13 19:43:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:23,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938236008] [2021-07-13 19:43:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:23,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938236008] [2021-07-13 19:43:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938236008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:23,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677119775] [2021-07-13 19:43:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:23,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:23,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:23,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:23,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:23,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:23,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:23,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,556 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:23,561 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:23,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:23,571 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:23,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:23,580 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:23,585 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,590 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:23,594 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:23,607 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,611 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:23,616 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,620 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,623 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:23,628 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:23,632 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:23,636 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:23,640 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:23,644 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:23,647 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:23,815 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:43:23,815 INFO L628 ElimStorePlain]: treesize reduction 208, result has 46.8 percent of original size [2021-07-13 19:43:23,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:23,817 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 1 variables, input treesize:991, output treesize:183 [2021-07-13 19:43:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:24,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677119775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:24,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:24,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:24,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837557502] [2021-07-13 19:43:24,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:24,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:24,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:24,069 INFO L87 Difference]: Start difference. First operand 742 states and 2496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:24,727 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-07-13 19:43:24,901 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-07-13 19:43:25,054 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2021-07-13 19:43:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:25,231 INFO L93 Difference]: Finished difference Result 987 states and 3121 transitions. [2021-07-13 19:43:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:43:25,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:25,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:25,233 INFO L225 Difference]: With dead ends: 987 [2021-07-13 19:43:25,233 INFO L226 Difference]: Without dead ends: 972 [2021-07-13 19:43:25,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1236.0ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:25,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-07-13 19:43:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2021-07-13 19:43:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.365358592692828) internal successors, (2487), 739 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2487 transitions. [2021-07-13 19:43:25,242 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2487 transitions. Word has length 19 [2021-07-13 19:43:25,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:25,242 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 2487 transitions. [2021-07-13 19:43:25,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:25,242 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2487 transitions. [2021-07-13 19:43:25,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:25,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:25,243 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:25,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2584 [2021-07-13 19:43:25,443 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -492203456, now seen corresponding path program 144 times [2021-07-13 19:43:25,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:25,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650424919] [2021-07-13 19:43:25,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:25,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:25,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650424919] [2021-07-13 19:43:25,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650424919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:25,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170519436] [2021-07-13 19:43:25,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:25,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:25,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:25,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:25,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:25,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:25,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:25,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:25,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:25,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:25,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:25,866 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:25,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:25,872 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:25,929 INFO L628 ElimStorePlain]: treesize reduction 53, result has 53.5 percent of original size [2021-07-13 19:43:25,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:25,930 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:279, output treesize:61 [2021-07-13 19:43:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170519436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:26,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-07-13 19:43:26,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104004226] [2021-07-13 19:43:26,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:43:26,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:26,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:43:26,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:43:26,031 INFO L87 Difference]: Start difference. First operand 740 states and 2487 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:26,604 INFO L93 Difference]: Finished difference Result 1046 states and 3281 transitions. [2021-07-13 19:43:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:26,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:26,606 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 19:43:26,606 INFO L226 Difference]: Without dead ends: 1031 [2021-07-13 19:43:26,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 655.2ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-13 19:43:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 743. [2021-07-13 19:43:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 3.371967654986523) internal successors, (2502), 742 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2502 transitions. [2021-07-13 19:43:26,615 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2502 transitions. Word has length 19 [2021-07-13 19:43:26,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:26,616 INFO L482 AbstractCegarLoop]: Abstraction has 743 states and 2502 transitions. [2021-07-13 19:43:26,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:26,616 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2502 transitions. [2021-07-13 19:43:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:26,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:26,617 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:26,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2608,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:26,817 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:26,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:26,817 INFO L82 PathProgramCache]: Analyzing trace with hash 259196982, now seen corresponding path program 145 times [2021-07-13 19:43:26,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:26,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443524196] [2021-07-13 19:43:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:26,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:26,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443524196] [2021-07-13 19:43:26,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443524196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:26,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78643263] [2021-07-13 19:43:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:27,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:27,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:27,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:27,219 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:27,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:27,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,233 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:27,238 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:27,247 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,252 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,256 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,261 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:27,265 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,269 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:27,274 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,278 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,282 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:27,286 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:27,290 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:27,294 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:27,298 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:27,301 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:27,464 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:43:27,465 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-07-13 19:43:27,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:27,467 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-07-13 19:43:27,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:27,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78643263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:27,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:27,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:27,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292036301] [2021-07-13 19:43:27,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:27,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:27,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:27,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:27,669 INFO L87 Difference]: Start difference. First operand 743 states and 2502 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:28,570 INFO L93 Difference]: Finished difference Result 1255 states and 3870 transitions. [2021-07-13 19:43:28,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:43:28,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:28,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:28,573 INFO L225 Difference]: With dead ends: 1255 [2021-07-13 19:43:28,573 INFO L226 Difference]: Without dead ends: 1225 [2021-07-13 19:43:28,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 934.1ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-13 19:43:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 750. [2021-07-13 19:43:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.391188251001335) internal successors, (2540), 749 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2540 transitions. [2021-07-13 19:43:28,591 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2540 transitions. Word has length 19 [2021-07-13 19:43:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:28,591 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2540 transitions. [2021-07-13 19:43:28,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2540 transitions. [2021-07-13 19:43:28,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:28,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:28,592 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:28,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2625 [2021-07-13 19:43:28,792 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:28,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1883534750, now seen corresponding path program 146 times [2021-07-13 19:43:28,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:28,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393035213] [2021-07-13 19:43:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:28,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:28,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393035213] [2021-07-13 19:43:28,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393035213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:28,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505302271] [2021-07-13 19:43:28,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:28,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:29,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:29,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,118 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:29,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:29,127 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:29,131 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:29,141 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:29,145 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:29,150 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,154 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,158 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,163 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:29,168 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,171 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:29,172 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:29,178 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:29,181 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:29,186 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:29,189 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:29,193 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:29,197 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:29,201 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:29,205 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:29,368 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:43:29,369 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-07-13 19:43:29,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:29,370 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-07-13 19:43:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:29,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505302271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:29,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:29,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:29,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127954080] [2021-07-13 19:43:29,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:29,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:29,600 INFO L87 Difference]: Start difference. First operand 750 states and 2540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,147 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-07-13 19:43:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:30,305 INFO L93 Difference]: Finished difference Result 1001 states and 3185 transitions. [2021-07-13 19:43:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:30,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:30,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:30,307 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:43:30,307 INFO L226 Difference]: Without dead ends: 986 [2021-07-13 19:43:30,307 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 838.7ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-07-13 19:43:30,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 744. [2021-07-13 19:43:30,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.3781965006729475) internal successors, (2510), 743 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2510 transitions. [2021-07-13 19:43:30,316 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2510 transitions. Word has length 19 [2021-07-13 19:43:30,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:30,316 INFO L482 AbstractCegarLoop]: Abstraction has 744 states and 2510 transitions. [2021-07-13 19:43:30,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:30,316 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2510 transitions. [2021-07-13 19:43:30,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:30,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:30,317 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:30,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2644,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,517 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:30,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2085937374, now seen corresponding path program 147 times [2021-07-13 19:43:30,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:30,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618146417] [2021-07-13 19:43:30,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:30,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618146417] [2021-07-13 19:43:30,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618146417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:30,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440677640] [2021-07-13 19:43:30,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:30,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:30,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:30,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:30,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:30,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:30,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:30,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:30,952 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:30,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:30,958 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:30,995 INFO L628 ElimStorePlain]: treesize reduction 52, result has 45.3 percent of original size [2021-07-13 19:43:30,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:30,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:159, output treesize:43 [2021-07-13 19:43:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440677640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:31,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:31,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923442466] [2021-07-13 19:43:31,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:31,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:31,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:31,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:31,045 INFO L87 Difference]: Start difference. First operand 744 states and 2510 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:31,445 INFO L93 Difference]: Finished difference Result 1000 states and 3206 transitions. [2021-07-13 19:43:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:31,447 INFO L225 Difference]: With dead ends: 1000 [2021-07-13 19:43:31,447 INFO L226 Difference]: Without dead ends: 985 [2021-07-13 19:43:31,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-13 19:43:31,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 753. [2021-07-13 19:43:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-07-13 19:43:31,456 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-07-13 19:43:31,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:31,457 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-07-13 19:43:31,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:31,457 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-07-13 19:43:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:31,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:31,457 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:31,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2667 [2021-07-13 19:43:31,658 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:31,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash 768591604, now seen corresponding path program 148 times [2021-07-13 19:43:31,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:31,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410700023] [2021-07-13 19:43:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:31,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410700023] [2021-07-13 19:43:31,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410700023] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:31,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847873606] [2021-07-13 19:43:31,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:31,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:31,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:31,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:31,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:32,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:32,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:32,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:32,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:32,082 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:32,085 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:32,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:32,092 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:32,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:32,099 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:32,163 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-07-13 19:43:32,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:32,164 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:43:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:32,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847873606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:32,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721497089] [2021-07-13 19:43:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:32,266 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:32,745 INFO L93 Difference]: Finished difference Result 1016 states and 3241 transitions. [2021-07-13 19:43:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:43:32,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:32,747 INFO L225 Difference]: With dead ends: 1016 [2021-07-13 19:43:32,747 INFO L226 Difference]: Without dead ends: 988 [2021-07-13 19:43:32,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:43:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-07-13 19:43:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 750. [2021-07-13 19:43:32,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-07-13 19:43:32,757 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-07-13 19:43:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:32,757 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-07-13 19:43:32,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-07-13 19:43:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:32,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:32,758 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:32,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2677 [2021-07-13 19:43:32,958 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash -903171294, now seen corresponding path program 149 times [2021-07-13 19:43:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:32,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240917967] [2021-07-13 19:43:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240917967] [2021-07-13 19:43:33,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240917967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724183184] [2021-07-13 19:43:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:33,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:33,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-07-13 19:43:33,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:33,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:33,381 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:33,384 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:33,387 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:33,390 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:33,437 INFO L628 ElimStorePlain]: treesize reduction 25, result has 68.8 percent of original size [2021-07-13 19:43:33,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:33,438 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:177, output treesize:55 [2021-07-13 19:43:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:33,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724183184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:33,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:33,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:33,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762442509] [2021-07-13 19:43:33,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:33,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:33,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:33,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:33,537 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:33,936 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-07-13 19:43:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:34,250 INFO L93 Difference]: Finished difference Result 1140 states and 3561 transitions. [2021-07-13 19:43:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:43:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:34,252 INFO L225 Difference]: With dead ends: 1140 [2021-07-13 19:43:34,252 INFO L226 Difference]: Without dead ends: 1075 [2021-07-13 19:43:34,252 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 765.8ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-07-13 19:43:34,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 752. [2021-07-13 19:43:34,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.3901464713715046) internal successors, (2546), 751 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2546 transitions. [2021-07-13 19:43:34,261 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2546 transitions. Word has length 19 [2021-07-13 19:43:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:34,262 INFO L482 AbstractCegarLoop]: Abstraction has 752 states and 2546 transitions. [2021-07-13 19:43:34,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2546 transitions. [2021-07-13 19:43:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:34,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:34,263 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:34,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-07-13 19:43:34,463 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:34,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:34,463 INFO L82 PathProgramCache]: Analyzing trace with hash 676206178, now seen corresponding path program 150 times [2021-07-13 19:43:34,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:34,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321046195] [2021-07-13 19:43:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:34,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:34,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321046195] [2021-07-13 19:43:34,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321046195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:34,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109868656] [2021-07-13 19:43:34,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:34,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:43:34,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:34,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:34,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:34,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:34,894 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:34,898 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,902 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:34,906 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,910 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:34,914 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:34,918 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,922 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,926 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:34,930 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:34,934 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:34,938 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:34,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:34,942 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:35,103 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-13 19:43:35,103 INFO L628 ElimStorePlain]: treesize reduction 123, result has 59.3 percent of original size [2021-07-13 19:43:35,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:35,105 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:179 [2021-07-13 19:43:35,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:35,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109868656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:35,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:35,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:35,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890616746] [2021-07-13 19:43:35,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:35,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:35,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:35,312 INFO L87 Difference]: Start difference. First operand 752 states and 2546 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:35,791 INFO L93 Difference]: Finished difference Result 1055 states and 3350 transitions. [2021-07-13 19:43:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:35,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:35,793 INFO L225 Difference]: With dead ends: 1055 [2021-07-13 19:43:35,793 INFO L226 Difference]: Without dead ends: 1040 [2021-07-13 19:43:35,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2021-07-13 19:43:35,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 753. [2021-07-13 19:43:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.393617021276596) internal successors, (2552), 752 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2552 transitions. [2021-07-13 19:43:35,803 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2552 transitions. Word has length 19 [2021-07-13 19:43:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:35,803 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2552 transitions. [2021-07-13 19:43:35,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2552 transitions. [2021-07-13 19:43:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:35,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:35,805 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:36,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2712 [2021-07-13 19:43:36,005 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:36,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:36,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1968548578, now seen corresponding path program 151 times [2021-07-13 19:43:36,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:36,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722248514] [2021-07-13 19:43:36,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:36,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:36,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722248514] [2021-07-13 19:43:36,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722248514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:36,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93157433] [2021-07-13 19:43:36,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:36,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:36,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:36,443 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,447 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:36,452 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:36,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:36,461 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,465 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:36,469 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,473 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:36,478 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:36,482 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:36,486 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,490 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,493 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:36,497 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:36,501 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:36,505 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:36,509 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:36,717 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-07-13 19:43:36,717 INFO L628 ElimStorePlain]: treesize reduction 66, result has 77.1 percent of original size [2021-07-13 19:43:36,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-07-13 19:43:36,720 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 1 variables, input treesize:787, output treesize:222 [2021-07-13 19:43:36,836 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-07-13 19:43:37,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:37,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93157433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:37,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:37,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:37,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578016121] [2021-07-13 19:43:37,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:37,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:37,028 INFO L87 Difference]: Start difference. First operand 753 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:37,563 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-07-13 19:43:37,773 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-07-13 19:43:37,901 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-07-13 19:43:38,087 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 19:43:38,265 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-07-13 19:43:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:38,350 INFO L93 Difference]: Finished difference Result 1126 states and 3545 transitions. [2021-07-13 19:43:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:43:38,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:38,352 INFO L225 Difference]: With dead ends: 1126 [2021-07-13 19:43:38,352 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 19:43:38,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1630.3ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:38,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 19:43:38,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-07-13 19:43:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3871829105473967) internal successors, (2537), 749 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2537 transitions. [2021-07-13 19:43:38,362 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2537 transitions. Word has length 19 [2021-07-13 19:43:38,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:38,362 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2537 transitions. [2021-07-13 19:43:38,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:38,362 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2537 transitions. [2021-07-13 19:43:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:38,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:38,363 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:38,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2732,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,563 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:38,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:38,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1242772622, now seen corresponding path program 152 times [2021-07-13 19:43:38,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:38,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552072350] [2021-07-13 19:43:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:38,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552072350] [2021-07-13 19:43:38,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552072350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:38,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819765264] [2021-07-13 19:43:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:38,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:38,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:43:38,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:38,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:38,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:38,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:38,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:38,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:38,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:38,946 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:38,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:38,949 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:39,018 INFO L628 ElimStorePlain]: treesize reduction 24, result has 77.6 percent of original size [2021-07-13 19:43:39,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-07-13 19:43:39,020 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 1 variables, input treesize:222, output treesize:83 [2021-07-13 19:43:39,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:39,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819765264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:39,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:39,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:39,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981149542] [2021-07-13 19:43:39,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:39,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:39,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:39,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:39,202 INFO L87 Difference]: Start difference. First operand 750 states and 2537 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:39,977 INFO L93 Difference]: Finished difference Result 1129 states and 3638 transitions. [2021-07-13 19:43:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:39,979 INFO L225 Difference]: With dead ends: 1129 [2021-07-13 19:43:39,979 INFO L226 Difference]: Without dead ends: 1072 [2021-07-13 19:43:39,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-07-13 19:43:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 756. [2021-07-13 19:43:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-07-13 19:43:39,990 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-07-13 19:43:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:39,990 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-07-13 19:43:39,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-07-13 19:43:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:39,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:39,991 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:40,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2754,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,191 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 746316214, now seen corresponding path program 153 times [2021-07-13 19:43:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:40,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912884838] [2021-07-13 19:43:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912884838] [2021-07-13 19:43:40,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912884838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220044071] [2021-07-13 19:43:40,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:43:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:40,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:40,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:40,487 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,490 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:40,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:40,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:40,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:40,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:40,505 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:40,508 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:40,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,514 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:40,515 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:40,518 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:40,601 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-07-13 19:43:40,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:40,602 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-07-13 19:43:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:40,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220044071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:40,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:40,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:40,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060679870] [2021-07-13 19:43:40,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:40,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:40,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:40,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:40,837 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,392 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2021-07-13 19:43:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:41,696 INFO L93 Difference]: Finished difference Result 1121 states and 3549 transitions. [2021-07-13 19:43:41,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:43:41,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:41,698 INFO L225 Difference]: With dead ends: 1121 [2021-07-13 19:43:41,698 INFO L226 Difference]: Without dead ends: 1106 [2021-07-13 19:43:41,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 907.4ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-13 19:43:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 764. [2021-07-13 19:43:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.403669724770642) internal successors, (2597), 763 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2597 transitions. [2021-07-13 19:43:41,709 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2597 transitions. Word has length 19 [2021-07-13 19:43:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:41,709 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2597 transitions. [2021-07-13 19:43:41,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2597 transitions. [2021-07-13 19:43:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:41,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:41,710 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:41,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2772 [2021-07-13 19:43:41,911 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:41,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:41,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2038658614, now seen corresponding path program 154 times [2021-07-13 19:43:41,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:41,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731047972] [2021-07-13 19:43:41,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731047972] [2021-07-13 19:43:42,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731047972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507676771] [2021-07-13 19:43:42,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:42,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:42,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:42,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:42,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:42,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,214 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:42,215 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:42,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,221 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:42,222 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:42,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:42,229 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:42,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:42,236 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:42,240 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:42,242 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:42,327 INFO L628 ElimStorePlain]: treesize reduction 53, result has 64.4 percent of original size [2021-07-13 19:43:42,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:42,329 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-07-13 19:43:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:42,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507676771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:42,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:42,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581340239] [2021-07-13 19:43:42,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:42,603 INFO L87 Difference]: Start difference. First operand 764 states and 2597 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,006 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-07-13 19:43:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:43,138 INFO L93 Difference]: Finished difference Result 1126 states and 3542 transitions. [2021-07-13 19:43:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:43,140 INFO L225 Difference]: With dead ends: 1126 [2021-07-13 19:43:43,140 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:43:43,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:43:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:43:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 763. [2021-07-13 19:43:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.400262467191601) internal successors, (2591), 762 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2591 transitions. [2021-07-13 19:43:43,151 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2591 transitions. Word has length 19 [2021-07-13 19:43:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:43,151 INFO L482 AbstractCegarLoop]: Abstraction has 763 states and 2591 transitions. [2021-07-13 19:43:43,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2591 transitions. [2021-07-13 19:43:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:43,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:43,152 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:43,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2788,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:43,352 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:43,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2079330760, now seen corresponding path program 155 times [2021-07-13 19:43:43,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:43,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100434122] [2021-07-13 19:43:43,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:43,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100434122] [2021-07-13 19:43:43,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100434122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867187201] [2021-07-13 19:43:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:43,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:43,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:43,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:43,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:43,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:43:43,649 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:43,652 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:43,656 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:43,659 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:43,671 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:43,674 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:43,678 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,680 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:43,681 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:43,684 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:43,688 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:43,775 INFO L628 ElimStorePlain]: treesize reduction 64, result has 61.7 percent of original size [2021-07-13 19:43:43,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:43,776 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:400, output treesize:103 [2021-07-13 19:43:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:43,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867187201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:43,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:43,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:43:43,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808895483] [2021-07-13 19:43:43,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:43:43,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:43:43,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:43:43,977 INFO L87 Difference]: Start difference. First operand 763 states and 2591 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:44,628 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:43:44,819 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-07-13 19:43:45,035 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2021-07-13 19:43:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:45,239 INFO L93 Difference]: Finished difference Result 1287 states and 3917 transitions. [2021-07-13 19:43:45,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:43:45,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:45,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:45,241 INFO L225 Difference]: With dead ends: 1287 [2021-07-13 19:43:45,241 INFO L226 Difference]: Without dead ends: 1233 [2021-07-13 19:43:45,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1266.8ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-07-13 19:43:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 754. [2021-07-13 19:43:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3891102257636123) internal successors, (2552), 753 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2552 transitions. [2021-07-13 19:43:45,252 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2552 transitions. Word has length 19 [2021-07-13 19:43:45,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:45,252 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2552 transitions. [2021-07-13 19:43:45,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:45,253 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2552 transitions. [2021-07-13 19:43:45,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:45,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:45,253 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:45,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2811 [2021-07-13 19:43:45,454 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:45,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1316107356, now seen corresponding path program 156 times [2021-07-13 19:43:45,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:45,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022111494] [2021-07-13 19:43:45,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:45,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:45,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022111494] [2021-07-13 19:43:45,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022111494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:45,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225231474] [2021-07-13 19:43:45,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:45,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:45,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:45,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:45,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:45,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:45,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:45,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,769 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:45,772 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:45,776 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:45,780 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,782 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,785 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:45,786 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:45,790 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:45,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:45,879 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-07-13 19:43:45,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:45,881 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-07-13 19:43:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:46,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225231474] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:46,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:46,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:46,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176125716] [2021-07-13 19:43:46,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:46,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:46,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:46,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:46,141 INFO L87 Difference]: Start difference. First operand 754 states and 2552 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,494 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-07-13 19:43:46,646 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-07-13 19:43:46,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:46,770 INFO L93 Difference]: Finished difference Result 1104 states and 3478 transitions. [2021-07-13 19:43:46,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:43:46,770 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:46,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:46,772 INFO L225 Difference]: With dead ends: 1104 [2021-07-13 19:43:46,772 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 19:43:46,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 778.2ms TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:43:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 19:43:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 750. [2021-07-13 19:43:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.3858477970627505) internal successors, (2536), 749 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2536 transitions. [2021-07-13 19:43:46,782 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2536 transitions. Word has length 19 [2021-07-13 19:43:46,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:46,782 INFO L482 AbstractCegarLoop]: Abstraction has 750 states and 2536 transitions. [2021-07-13 19:43:46,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2536 transitions. [2021-07-13 19:43:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:46,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:46,783 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:46,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2832 [2021-07-13 19:43:46,984 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:46,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:46,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1681207660, now seen corresponding path program 157 times [2021-07-13 19:43:46,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:46,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678097169] [2021-07-13 19:43:46,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:47,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678097169] [2021-07-13 19:43:47,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678097169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127471888] [2021-07-13 19:43:47,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:47,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:47,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:47,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:47,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:47,356 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:47,361 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,364 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,365 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,368 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,369 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,372 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:47,376 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,379 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,382 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:47,385 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:47,388 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:47,391 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:47,441 INFO L628 ElimStorePlain]: treesize reduction 6, result has 91.0 percent of original size [2021-07-13 19:43:47,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:47,442 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 1 variables, input treesize:486, output treesize:61 [2021-07-13 19:43:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:47,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127471888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:47,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:47,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:47,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853376393] [2021-07-13 19:43:47,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:47,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:47,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:47,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:47,531 INFO L87 Difference]: Start difference. First operand 750 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:48,209 INFO L93 Difference]: Finished difference Result 1067 states and 3396 transitions. [2021-07-13 19:43:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:43:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:48,211 INFO L225 Difference]: With dead ends: 1067 [2021-07-13 19:43:48,211 INFO L226 Difference]: Without dead ends: 1052 [2021-07-13 19:43:48,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 669.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:43:48,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-07-13 19:43:48,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 756. [2021-07-13 19:43:48,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.394701986754967) internal successors, (2563), 755 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2563 transitions. [2021-07-13 19:43:48,221 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2563 transitions. Word has length 19 [2021-07-13 19:43:48,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:48,221 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 2563 transitions. [2021-07-13 19:43:48,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:48,222 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2563 transitions. [2021-07-13 19:43:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:48,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:48,222 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:48,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2853 [2021-07-13 19:43:48,423 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1862359198, now seen corresponding path program 158 times [2021-07-13 19:43:48,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:48,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193000382] [2021-07-13 19:43:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:48,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193000382] [2021-07-13 19:43:48,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193000382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:48,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249470357] [2021-07-13 19:43:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:48,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:43:48,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:48,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:48,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:48,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:48,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:48,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:48,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:48,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:48,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:48,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:48,816 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:48,820 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:48,825 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:48,830 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:48,835 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:48,840 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:48,845 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:48,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:48,855 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:48,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:48,859 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:49,056 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:43:49,056 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:43:49,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:49,059 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:43:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:49,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249470357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:49,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:49,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:49,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816418728] [2021-07-13 19:43:49,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:49,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:49,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:49,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:49,259 INFO L87 Difference]: Start difference. First operand 756 states and 2563 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:49,988 INFO L93 Difference]: Finished difference Result 1104 states and 3486 transitions. [2021-07-13 19:43:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:49,991 INFO L225 Difference]: With dead ends: 1104 [2021-07-13 19:43:49,991 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 19:43:49,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 781.0ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 19:43:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 759. [2021-07-13 19:43:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.401055408970976) internal successors, (2578), 758 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2578 transitions. [2021-07-13 19:43:50,002 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2578 transitions. Word has length 19 [2021-07-13 19:43:50,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:50,002 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2578 transitions. [2021-07-13 19:43:50,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:50,002 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2578 transitions. [2021-07-13 19:43:50,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:50,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:50,003 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:50,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2875,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:50,203 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:50,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -238021430, now seen corresponding path program 159 times [2021-07-13 19:43:50,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:50,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006830557] [2021-07-13 19:43:50,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:50,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:50,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006830557] [2021-07-13 19:43:50,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006830557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:50,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596507279] [2021-07-13 19:43:50,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:50,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:43:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:50,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:50,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:50,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:50,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:50,617 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:50,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:50,625 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:50,629 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:50,633 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:50,637 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:50,641 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:50,645 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:50,649 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:50,654 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:50,657 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:50,661 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:50,665 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:50,828 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:43:50,829 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-07-13 19:43:50,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:43:50,831 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-07-13 19:43:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:51,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596507279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:51,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:51,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:51,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912690998] [2021-07-13 19:43:51,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:51,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:51,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:51,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:51,114 INFO L87 Difference]: Start difference. First operand 759 states and 2578 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:51,806 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-07-13 19:43:51,972 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-07-13 19:43:52,123 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-07-13 19:43:52,350 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-07-13 19:43:52,472 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2021-07-13 19:43:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:52,560 INFO L93 Difference]: Finished difference Result 1101 states and 3482 transitions. [2021-07-13 19:43:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:43:52,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:52,563 INFO L225 Difference]: With dead ends: 1101 [2021-07-13 19:43:52,563 INFO L226 Difference]: Without dead ends: 1086 [2021-07-13 19:43:52,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1518.4ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:52,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-13 19:43:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 753. [2021-07-13 19:43:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 752 states have (on average 3.3882978723404253) internal successors, (2548), 752 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2548 transitions. [2021-07-13 19:43:52,574 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2548 transitions. Word has length 19 [2021-07-13 19:43:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:52,574 INFO L482 AbstractCegarLoop]: Abstraction has 753 states and 2548 transitions. [2021-07-13 19:43:52,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:52,574 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2548 transitions. [2021-07-13 19:43:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:52,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:52,575 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:52,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2894 [2021-07-13 19:43:52,775 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -102306258, now seen corresponding path program 160 times [2021-07-13 19:43:52,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:52,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836607858] [2021-07-13 19:43:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836607858] [2021-07-13 19:43:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836607858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747049801] [2021-07-13 19:43:53,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:53,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:43:53,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:53,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:53,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:53,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:53,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:53,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,226 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:53,226 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:53,231 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:53,236 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:53,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:53,243 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,246 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:53,247 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:53,251 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:53,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:53,350 INFO L628 ElimStorePlain]: treesize reduction 42, result has 71.2 percent of original size [2021-07-13 19:43:53,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:53,352 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:104 [2021-07-13 19:43:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:53,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747049801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:53,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:53,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:53,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049658995] [2021-07-13 19:43:53,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:53,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:53,601 INFO L87 Difference]: Start difference. First operand 753 states and 2548 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:53,968 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-13 19:43:54,199 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 19:43:54,477 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-07-13 19:43:54,631 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2021-07-13 19:43:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:54,643 INFO L93 Difference]: Finished difference Result 1117 states and 3560 transitions. [2021-07-13 19:43:54,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:43:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:54,645 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:43:54,645 INFO L226 Difference]: Without dead ends: 1102 [2021-07-13 19:43:54,645 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1254.4ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:43:54,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-07-13 19:43:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 759. [2021-07-13 19:43:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.3970976253298155) internal successors, (2575), 758 states have internal predecessors, (2575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2575 transitions. [2021-07-13 19:43:54,656 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2575 transitions. Word has length 19 [2021-07-13 19:43:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:54,656 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 2575 transitions. [2021-07-13 19:43:54,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2575 transitions. [2021-07-13 19:43:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:54,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:54,657 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:54,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:54,857 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1522031510, now seen corresponding path program 161 times [2021-07-13 19:43:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:54,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257428265] [2021-07-13 19:43:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257428265] [2021-07-13 19:43:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257428265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387544466] [2021-07-13 19:43:55,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:55,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:43:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:55,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:55,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:55,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:55,251 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:55,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:55,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:55,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:55,265 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:55,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:55,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:55,276 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:55,279 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:55,363 INFO L628 ElimStorePlain]: treesize reduction 52, result has 66.7 percent of original size [2021-07-13 19:43:55,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:55,364 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 1 variables, input treesize:338, output treesize:104 [2021-07-13 19:43:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:55,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387544466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:55,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:55,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:55,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773433679] [2021-07-13 19:43:55,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:55,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:55,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:55,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:55,657 INFO L87 Difference]: Start difference. First operand 759 states and 2575 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,014 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2021-07-13 19:43:56,165 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-07-13 19:43:56,316 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-07-13 19:43:56,482 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-07-13 19:43:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:56,517 INFO L93 Difference]: Finished difference Result 1130 states and 3590 transitions. [2021-07-13 19:43:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:43:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:56,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:56,519 INFO L225 Difference]: With dead ends: 1130 [2021-07-13 19:43:56,519 INFO L226 Difference]: Without dead ends: 1115 [2021-07-13 19:43:56,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1072.0ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:43:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-07-13 19:43:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 754. [2021-07-13 19:43:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-07-13 19:43:56,529 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-07-13 19:43:56,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:56,530 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-07-13 19:43:56,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-07-13 19:43:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:56,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:56,531 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:56,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2933,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,731 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1732699988, now seen corresponding path program 162 times [2021-07-13 19:43:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259990811] [2021-07-13 19:43:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:56,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:56,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259990811] [2021-07-13 19:43:56,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259990811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:56,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376998339] [2021-07-13 19:43:56,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:56,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:43:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:43:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:57,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:57,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:57,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:57,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,067 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,071 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:43:57,074 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:57,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,080 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,084 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:57,086 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:57,169 INFO L628 ElimStorePlain]: treesize reduction 8, result has 92.5 percent of original size [2021-07-13 19:43:57,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:43:57,171 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:352, output treesize:99 [2021-07-13 19:43:57,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:57,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376998339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:57,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:57,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:57,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080774175] [2021-07-13 19:43:57,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:57,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:57,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:57,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:57,456 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:57,752 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-07-13 19:43:57,924 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-07-13 19:43:58,295 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-07-13 19:43:58,420 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2021-07-13 19:43:58,582 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-07-13 19:43:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:43:58,762 INFO L93 Difference]: Finished difference Result 1138 states and 3632 transitions. [2021-07-13 19:43:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:43:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:43:58,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:43:58,764 INFO L225 Difference]: With dead ends: 1138 [2021-07-13 19:43:58,764 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:43:58,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1358.1ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:43:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:43:58,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 754. [2021-07-13 19:43:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.3904382470119523) internal successors, (2553), 753 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2553 transitions. [2021-07-13 19:43:58,775 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2553 transitions. Word has length 19 [2021-07-13 19:43:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:43:58,775 INFO L482 AbstractCegarLoop]: Abstraction has 754 states and 2553 transitions. [2021-07-13 19:43:58,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:43:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2553 transitions. [2021-07-13 19:43:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:43:58,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:43:58,776 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:43:58,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-07-13 19:43:58,976 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:43:58,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:43:58,977 INFO L82 PathProgramCache]: Analyzing trace with hash -288765254, now seen corresponding path program 163 times [2021-07-13 19:43:58,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:43:58,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62324725] [2021-07-13 19:43:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:43:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:43:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62324725] [2021-07-13 19:43:59,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62324725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538386592] [2021-07-13 19:43:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:43:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:43:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:43:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:43:59,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:43:59,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:43:59,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:59,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,378 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:59,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:59,383 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:43:59,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:43:59,391 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:43:59,394 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:43:59,449 INFO L628 ElimStorePlain]: treesize reduction 36, result has 62.9 percent of original size [2021-07-13 19:43:59,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:43:59,450 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:273, output treesize:61 [2021-07-13 19:43:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:43:59,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538386592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:43:59,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:43:59,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:43:59,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300462741] [2021-07-13 19:43:59,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:43:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:43:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:43:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:43:59,539 INFO L87 Difference]: Start difference. First operand 754 states and 2553 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:00,538 INFO L93 Difference]: Finished difference Result 1155 states and 3717 transitions. [2021-07-13 19:44:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:00,540 INFO L225 Difference]: With dead ends: 1155 [2021-07-13 19:44:00,540 INFO L226 Difference]: Without dead ends: 1140 [2021-07-13 19:44:00,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1032.4ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:44:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-13 19:44:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 760. [2021-07-13 19:44:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.391304347826087) internal successors, (2574), 759 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2574 transitions. [2021-07-13 19:44:00,550 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2574 transitions. Word has length 19 [2021-07-13 19:44:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:00,550 INFO L482 AbstractCegarLoop]: Abstraction has 760 states and 2574 transitions. [2021-07-13 19:44:00,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2574 transitions. [2021-07-13 19:44:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:00,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:00,551 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:00,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,752 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1723590848, now seen corresponding path program 164 times [2021-07-13 19:44:00,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:00,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876455616] [2021-07-13 19:44:00,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:00,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876455616] [2021-07-13 19:44:00,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876455616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:00,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057089306] [2021-07-13 19:44:00,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:00,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:44:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:01,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:01,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:01,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:01,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:01,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:01,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:01,221 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:01,224 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:01,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:01,231 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:01,296 INFO L628 ElimStorePlain]: treesize reduction 27, result has 71.3 percent of original size [2021-07-13 19:44:01,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:01,297 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:349, output treesize:67 [2021-07-13 19:44:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057089306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:01,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:01,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787466576] [2021-07-13 19:44:01,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:01,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:01,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:01,406 INFO L87 Difference]: Start difference. First operand 760 states and 2574 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:01,924 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-07-13 19:44:02,064 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 39 [2021-07-13 19:44:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:02,148 INFO L93 Difference]: Finished difference Result 1210 states and 3856 transitions. [2021-07-13 19:44:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:02,150 INFO L225 Difference]: With dead ends: 1210 [2021-07-13 19:44:02,150 INFO L226 Difference]: Without dead ends: 1167 [2021-07-13 19:44:02,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:02,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-13 19:44:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 766. [2021-07-13 19:44:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 3.3986928104575163) internal successors, (2600), 765 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 2600 transitions. [2021-07-13 19:44:02,161 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 2600 transitions. Word has length 19 [2021-07-13 19:44:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:02,161 INFO L482 AbstractCegarLoop]: Abstraction has 766 states and 2600 transitions. [2021-07-13 19:44:02,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 2600 transitions. [2021-07-13 19:44:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:02,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:02,162 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:02,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2997,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,363 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:02,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1819976010, now seen corresponding path program 165 times [2021-07-13 19:44:02,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:02,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142063378] [2021-07-13 19:44:02,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:02,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142063378] [2021-07-13 19:44:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142063378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071560854] [2021-07-13 19:44:02,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:02,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:02,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:02,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:02,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:02,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:02,756 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:02,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:02,764 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:02,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:02,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:02,777 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:02,781 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:02,785 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:02,789 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:02,793 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:02,797 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:02,801 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:02,805 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:02,810 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:02,813 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:02,987 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:44:02,987 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-07-13 19:44:02,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:44:02,989 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-07-13 19:44:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:03,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071560854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:03,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:03,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:03,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485148861] [2021-07-13 19:44:03,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:03,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:03,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:03,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:03,196 INFO L87 Difference]: Start difference. First operand 766 states and 2600 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:03,918 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-07-13 19:44:04,190 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2021-07-13 19:44:04,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:04,594 INFO L93 Difference]: Finished difference Result 1471 states and 4478 transitions. [2021-07-13 19:44:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:04,594 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:04,597 INFO L225 Difference]: With dead ends: 1471 [2021-07-13 19:44:04,597 INFO L226 Difference]: Without dead ends: 1441 [2021-07-13 19:44:04,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1478.9ms TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:44:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-07-13 19:44:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 781. [2021-07-13 19:44:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4166666666666665) internal successors, (2665), 780 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2665 transitions. [2021-07-13 19:44:04,610 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2665 transitions. Word has length 19 [2021-07-13 19:44:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:04,610 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2665 transitions. [2021-07-13 19:44:04,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2665 transitions. [2021-07-13 19:44:04,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:04,611 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:04,611 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:04,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:04,812 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:04,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:04,812 INFO L82 PathProgramCache]: Analyzing trace with hash -527633610, now seen corresponding path program 166 times [2021-07-13 19:44:04,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:04,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306485184] [2021-07-13 19:44:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:04,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306485184] [2021-07-13 19:44:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306485184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432136890] [2021-07-13 19:44:05,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:05,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:05,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:05,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:05,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:05,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:05,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:05,288 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:05,292 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:05,296 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:05,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:05,304 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:05,308 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:05,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:05,315 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:05,320 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:05,323 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:05,327 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:05,331 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:05,335 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:05,338 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:05,497 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2021-07-13 19:44:05,497 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.4 percent of original size [2021-07-13 19:44:05,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:44:05,499 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:661, output treesize:184 [2021-07-13 19:44:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:05,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432136890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:05,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:05,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:05,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825920365] [2021-07-13 19:44:05,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:05,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:05,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:05,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:05,775 INFO L87 Difference]: Start difference. First operand 781 states and 2665 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:06,209 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-07-13 19:44:06,512 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-07-13 19:44:06,804 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-07-13 19:44:07,066 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-07-13 19:44:07,291 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2021-07-13 19:44:07,549 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2021-07-13 19:44:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:07,611 INFO L93 Difference]: Finished difference Result 1216 states and 3901 transitions. [2021-07-13 19:44:07,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:07,613 INFO L225 Difference]: With dead ends: 1216 [2021-07-13 19:44:07,613 INFO L226 Difference]: Without dead ends: 1201 [2021-07-13 19:44:07,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 2060.5ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-13 19:44:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 776. [2021-07-13 19:44:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.410322580645161) internal successors, (2643), 775 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2643 transitions. [2021-07-13 19:44:07,625 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2643 transitions. Word has length 19 [2021-07-13 19:44:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:07,625 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2643 transitions. [2021-07-13 19:44:07,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2643 transitions. [2021-07-13 19:44:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:07,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:07,626 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:07,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3032 [2021-07-13 19:44:07,826 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:07,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:07,827 INFO L82 PathProgramCache]: Analyzing trace with hash 874968376, now seen corresponding path program 167 times [2021-07-13 19:44:07,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:07,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320782889] [2021-07-13 19:44:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320782889] [2021-07-13 19:44:08,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320782889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807342239] [2021-07-13 19:44:08,039 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:08,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:08,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:44:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:08,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:08,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:08,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:08,349 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:08,352 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:08,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:08,359 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:08,363 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:08,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:08,369 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:08,436 INFO L628 ElimStorePlain]: treesize reduction 31, result has 68.4 percent of original size [2021-07-13 19:44:08,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-07-13 19:44:08,437 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:337, output treesize:67 [2021-07-13 19:44:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:08,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807342239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:08,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:08,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467321788] [2021-07-13 19:44:08,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:08,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:08,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:08,535 INFO L87 Difference]: Start difference. First operand 776 states and 2643 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:09,615 INFO L93 Difference]: Finished difference Result 1217 states and 3838 transitions. [2021-07-13 19:44:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:44:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:09,617 INFO L225 Difference]: With dead ends: 1217 [2021-07-13 19:44:09,617 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 19:44:09,617 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1173.7ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:44:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 19:44:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 782. [2021-07-13 19:44:09,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.418693982074264) internal successors, (2670), 781 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2670 transitions. [2021-07-13 19:44:09,628 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2670 transitions. Word has length 19 [2021-07-13 19:44:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:09,628 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2670 transitions. [2021-07-13 19:44:09,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:09,629 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2670 transitions. [2021-07-13 19:44:09,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:09,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:09,630 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:09,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3055 [2021-07-13 19:44:09,830 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:09,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1626368814, now seen corresponding path program 168 times [2021-07-13 19:44:09,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:09,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121863906] [2021-07-13 19:44:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:10,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121863906] [2021-07-13 19:44:10,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121863906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004178171] [2021-07-13 19:44:10,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:10,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:10,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:10,259 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:10,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:10,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:10,271 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:10,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:10,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:10,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:10,287 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:10,291 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:10,295 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:10,299 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:10,304 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:10,307 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:10,311 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:10,315 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:10,479 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:44:10,480 INFO L628 ElimStorePlain]: treesize reduction 153, result has 53.9 percent of original size [2021-07-13 19:44:10,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:44:10,482 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:637, output treesize:179 [2021-07-13 19:44:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:10,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004178171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:10,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:10,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:10,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597221697] [2021-07-13 19:44:10,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:10,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:10,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:10,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:10,690 INFO L87 Difference]: Start difference. First operand 782 states and 2670 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,290 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-07-13 19:44:11,496 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-13 19:44:11,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:11,810 INFO L93 Difference]: Finished difference Result 1347 states and 4170 transitions. [2021-07-13 19:44:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:11,813 INFO L225 Difference]: With dead ends: 1347 [2021-07-13 19:44:11,813 INFO L226 Difference]: Without dead ends: 1317 [2021-07-13 19:44:11,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1281.7ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:11,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2021-07-13 19:44:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 783. [2021-07-13 19:44:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4309462915601023) internal successors, (2683), 782 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2683 transitions. [2021-07-13 19:44:11,829 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2683 transitions. Word has length 19 [2021-07-13 19:44:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:11,829 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2683 transitions. [2021-07-13 19:44:11,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2683 transitions. [2021-07-13 19:44:11,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:11,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:11,830 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:12,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,031 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:12,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:12,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1376256082, now seen corresponding path program 169 times [2021-07-13 19:44:12,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:12,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725535911] [2021-07-13 19:44:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:12,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725535911] [2021-07-13 19:44:12,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725535911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082325357] [2021-07-13 19:44:12,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:12,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:12,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:12,435 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:12,439 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:12,444 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,449 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:12,454 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:12,459 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:12,463 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,468 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,472 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,476 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:12,481 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:12,484 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:12,489 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,492 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:12,493 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:12,497 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:12,501 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:12,505 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:12,509 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:12,513 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:12,517 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:12,681 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2021-07-13 19:44:12,682 INFO L628 ElimStorePlain]: treesize reduction 148, result has 55.4 percent of original size [2021-07-13 19:44:12,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-07-13 19:44:12,684 INFO L247 ElimStorePlain]: Needed 23 recursive calls to eliminate 1 variables, input treesize:939, output treesize:184 [2021-07-13 19:44:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:12,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082325357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:12,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:12,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:12,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629109270] [2021-07-13 19:44:12,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:12,931 INFO L87 Difference]: Start difference. First operand 783 states and 2683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:13,493 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2021-07-13 19:44:13,709 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2021-07-13 19:44:14,029 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 60 [2021-07-13 19:44:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:14,069 INFO L93 Difference]: Finished difference Result 1227 states and 3873 transitions. [2021-07-13 19:44:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:14,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:14,071 INFO L225 Difference]: With dead ends: 1227 [2021-07-13 19:44:14,071 INFO L226 Difference]: Without dead ends: 1212 [2021-07-13 19:44:14,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1291.4ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-13 19:44:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 777. [2021-07-13 19:44:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.4188144329896906) internal successors, (2653), 776 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2653 transitions. [2021-07-13 19:44:14,083 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2653 transitions. Word has length 19 [2021-07-13 19:44:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:14,083 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2653 transitions. [2021-07-13 19:44:14,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2653 transitions. [2021-07-13 19:44:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:14,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:14,084 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:14,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3090 [2021-07-13 19:44:14,284 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:14,285 INFO L82 PathProgramCache]: Analyzing trace with hash -908545542, now seen corresponding path program 170 times [2021-07-13 19:44:14,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:14,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502740316] [2021-07-13 19:44:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502740316] [2021-07-13 19:44:14,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502740316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15113513] [2021-07-13 19:44:14,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:14,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:14,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:14,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:14,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:14,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:14,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:14,631 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:14,635 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:14,639 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:14,642 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:14,646 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,648 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:14,649 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,651 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:14,652 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:14,655 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:14,658 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:14,743 INFO L628 ElimStorePlain]: treesize reduction 45, result has 69.8 percent of original size [2021-07-13 19:44:14,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:14,744 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:376, output treesize:104 [2021-07-13 19:44:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15113513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:14,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:14,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:14,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691616772] [2021-07-13 19:44:14,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:14,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:14,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:14,994 INFO L87 Difference]: Start difference. First operand 777 states and 2653 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,558 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-07-13 19:44:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:15,849 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-07-13 19:44:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:15,852 INFO L225 Difference]: With dead ends: 1263 [2021-07-13 19:44:15,852 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 19:44:15,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 977.2ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 19:44:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 783. [2021-07-13 19:44:15,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4271099744245523) internal successors, (2680), 782 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2680 transitions. [2021-07-13 19:44:15,863 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2680 transitions. Word has length 19 [2021-07-13 19:44:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:15,864 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2680 transitions. [2021-07-13 19:44:15,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2680 transitions. [2021-07-13 19:44:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:15,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:15,865 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:16,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3114,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:16,065 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash 715792226, now seen corresponding path program 171 times [2021-07-13 19:44:16,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:16,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702197827] [2021-07-13 19:44:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:16,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:16,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702197827] [2021-07-13 19:44:16,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702197827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981917788] [2021-07-13 19:44:16,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:16,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:16,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:16,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:16,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:16,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:16,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:16,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:16,400 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:16,403 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:16,406 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:16,410 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:16,413 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:16,416 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:16,420 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:16,423 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:16,506 INFO L628 ElimStorePlain]: treesize reduction 49, result has 66.2 percent of original size [2021-07-13 19:44:16,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:16,507 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 1 variables, input treesize:382, output treesize:96 [2021-07-13 19:44:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:16,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981917788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:16,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:16,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:44:16,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842068710] [2021-07-13 19:44:16,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:44:16,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:16,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:44:16,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:44:16,794 INFO L87 Difference]: Start difference. First operand 783 states and 2680 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:17,246 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-07-13 19:44:17,556 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-07-13 19:44:17,774 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-07-13 19:44:17,997 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-07-13 19:44:18,258 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-07-13 19:44:18,404 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2021-07-13 19:44:18,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:18,478 INFO L93 Difference]: Finished difference Result 1290 states and 4088 transitions. [2021-07-13 19:44:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:18,481 INFO L225 Difference]: With dead ends: 1290 [2021-07-13 19:44:18,481 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 19:44:18,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1754.5ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:44:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 19:44:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 780. [2021-07-13 19:44:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.4210526315789473) internal successors, (2665), 779 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2665 transitions. [2021-07-13 19:44:18,493 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2665 transitions. Word has length 19 [2021-07-13 19:44:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:18,493 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2665 transitions. [2021-07-13 19:44:18,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2665 transitions. [2021-07-13 19:44:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:44:18,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:18,494 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:18,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3135,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,695 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash 424469004, now seen corresponding path program 172 times [2021-07-13 19:44:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:18,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239126518] [2021-07-13 19:44:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:18,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239126518] [2021-07-13 19:44:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239126518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930815799] [2021-07-13 19:44:18,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:18,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:18,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:18,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:44:18,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:18,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:44:18,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-07-13 19:44:18,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:18,979 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2021-07-13 19:44:18,984 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:18,988 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:44:18,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-07-13 19:44:18,996 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:18,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:44:19,000 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-07-13 19:44:19,098 INFO L628 ElimStorePlain]: treesize reduction 24, result has 81.3 percent of original size [2021-07-13 19:44:19,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-07-13 19:44:19,100 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 1 variables, input treesize:267, output treesize:104 [2021-07-13 19:44:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:19,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930815799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:19,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:19,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-07-13 19:44:19,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926624088] [2021-07-13 19:44:19,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:19,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:19,357 INFO L87 Difference]: Start difference. First operand 780 states and 2665 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:19,810 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-07-13 19:44:20,062 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-07-13 19:44:20,342 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-07-13 19:44:20,847 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-07-13 19:44:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:20,848 INFO L93 Difference]: Finished difference Result 1248 states and 3944 transitions. [2021-07-13 19:44:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:20,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:44:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:20,850 INFO L225 Difference]: With dead ends: 1248 [2021-07-13 19:44:20,850 INFO L226 Difference]: Without dead ends: 1194 [2021-07-13 19:44:20,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1545.7ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-07-13 19:44:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 781. [2021-07-13 19:44:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.424358974358974) internal successors, (2671), 780 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2671 transitions. [2021-07-13 19:44:20,861 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2671 transitions. Word has length 19 [2021-07-13 19:44:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:20,861 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2671 transitions. [2021-07-13 19:44:20,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2671 transitions. [2021-07-13 19:44:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:20,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:20,862 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:21,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,063 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:21,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2146836536, now seen corresponding path program 2 times [2021-07-13 19:44:21,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:21,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050880840] [2021-07-13 19:44:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:44:21,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050880840] [2021-07-13 19:44:21,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050880840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209618671] [2021-07-13 19:44:21,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:21,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:21,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:21,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:21,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209618671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:21,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:21,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2021-07-13 19:44:21,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119059083] [2021-07-13 19:44:21,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:21,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:21,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:21,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:21,243 INFO L87 Difference]: Start difference. First operand 781 states and 2671 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:21,791 INFO L93 Difference]: Finished difference Result 1318 states and 4347 transitions. [2021-07-13 19:44:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:44:21,791 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:21,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:21,793 INFO L225 Difference]: With dead ends: 1318 [2021-07-13 19:44:21,793 INFO L226 Difference]: Without dead ends: 1069 [2021-07-13 19:44:21,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=187, Invalid=569, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:44:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-07-13 19:44:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 855. [2021-07-13 19:44:21,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.4168618266978923) internal successors, (2918), 854 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2918 transitions. [2021-07-13 19:44:21,804 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2918 transitions. Word has length 20 [2021-07-13 19:44:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:21,804 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2918 transitions. [2021-07-13 19:44:21,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2918 transitions. [2021-07-13 19:44:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:21,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:21,805 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:22,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3178,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,006 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1544491944, now seen corresponding path program 173 times [2021-07-13 19:44:22,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:22,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779565040] [2021-07-13 19:44:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:22,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779565040] [2021-07-13 19:44:22,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779565040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211827805] [2021-07-13 19:44:22,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:22,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211827805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:22,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:22,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411853784] [2021-07-13 19:44:22,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:22,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:22,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:22,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:22,208 INFO L87 Difference]: Start difference. First operand 855 states and 2918 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:22,448 INFO L93 Difference]: Finished difference Result 1161 states and 3732 transitions. [2021-07-13 19:44:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:22,451 INFO L225 Difference]: With dead ends: 1161 [2021-07-13 19:44:22,451 INFO L226 Difference]: Without dead ends: 1161 [2021-07-13 19:44:22,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-13 19:44:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 868. [2021-07-13 19:44:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4140715109573243) internal successors, (2960), 867 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2960 transitions. [2021-07-13 19:44:22,469 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2960 transitions. Word has length 20 [2021-07-13 19:44:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:22,469 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2960 transitions. [2021-07-13 19:44:22,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2960 transitions. [2021-07-13 19:44:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:22,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:22,470 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:22,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3181 [2021-07-13 19:44:22,671 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:22,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1192264290, now seen corresponding path program 174 times [2021-07-13 19:44:22,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:22,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394876259] [2021-07-13 19:44:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:22,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394876259] [2021-07-13 19:44:22,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394876259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802099870] [2021-07-13 19:44:22,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:22,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:22,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:22,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802099870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:22,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:22,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:22,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110677289] [2021-07-13 19:44:22,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:22,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:22,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:22,865 INFO L87 Difference]: Start difference. First operand 868 states and 2960 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:23,115 INFO L93 Difference]: Finished difference Result 1135 states and 3672 transitions. [2021-07-13 19:44:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:23,117 INFO L225 Difference]: With dead ends: 1135 [2021-07-13 19:44:23,117 INFO L226 Difference]: Without dead ends: 1135 [2021-07-13 19:44:23,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 240.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-07-13 19:44:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 871. [2021-07-13 19:44:23,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-07-13 19:44:23,128 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-07-13 19:44:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:23,128 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-07-13 19:44:23,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-07-13 19:44:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:23,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:23,130 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:23,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3183,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,330 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1978318310, now seen corresponding path program 175 times [2021-07-13 19:44:23,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:23,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866812615] [2021-07-13 19:44:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866812615] [2021-07-13 19:44:23,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866812615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8090329] [2021-07-13 19:44:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:23,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:23,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:23,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8090329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:23,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:23,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:23,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051928407] [2021-07-13 19:44:23,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:23,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:23,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:23,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:23,567 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:24,071 INFO L93 Difference]: Finished difference Result 1111 states and 3575 transitions. [2021-07-13 19:44:24,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:24,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:24,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:24,073 INFO L225 Difference]: With dead ends: 1111 [2021-07-13 19:44:24,073 INFO L226 Difference]: Without dead ends: 1104 [2021-07-13 19:44:24,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 500.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-13 19:44:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 884. [2021-07-13 19:44:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-07-13 19:44:24,085 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-07-13 19:44:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:24,085 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-07-13 19:44:24,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-07-13 19:44:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:24,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:24,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:24,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3185 [2021-07-13 19:44:24,287 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:24,287 INFO L82 PathProgramCache]: Analyzing trace with hash -483906072, now seen corresponding path program 176 times [2021-07-13 19:44:24,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:24,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056782693] [2021-07-13 19:44:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:24,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056782693] [2021-07-13 19:44:24,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056782693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628422963] [2021-07-13 19:44:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628422963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:24,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:24,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:24,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035099517] [2021-07-13 19:44:24,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:24,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:24,496 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:24,897 INFO L93 Difference]: Finished difference Result 1167 states and 3744 transitions. [2021-07-13 19:44:24,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:24,897 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:24,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:24,899 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:44:24,899 INFO L226 Difference]: Without dead ends: 1167 [2021-07-13 19:44:24,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-13 19:44:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 884. [2021-07-13 19:44:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.406568516421291) internal successors, (3008), 883 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3008 transitions. [2021-07-13 19:44:24,911 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3008 transitions. Word has length 20 [2021-07-13 19:44:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:24,911 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3008 transitions. [2021-07-13 19:44:24,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3008 transitions. [2021-07-13 19:44:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:24,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:24,912 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:25,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3191,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,113 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:25,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1977813794, now seen corresponding path program 177 times [2021-07-13 19:44:25,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:25,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705401893] [2021-07-13 19:44:25,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705401893] [2021-07-13 19:44:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705401893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249698704] [2021-07-13 19:44:25,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:25,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:25,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249698704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:25,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:25,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673713783] [2021-07-13 19:44:25,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:25,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:25,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:25,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:25,319 INFO L87 Difference]: Start difference. First operand 884 states and 3008 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:25,566 INFO L93 Difference]: Finished difference Result 1124 states and 3641 transitions. [2021-07-13 19:44:25,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:25,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:25,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:25,568 INFO L225 Difference]: With dead ends: 1124 [2021-07-13 19:44:25,568 INFO L226 Difference]: Without dead ends: 1118 [2021-07-13 19:44:25,568 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 245.8ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:25,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-07-13 19:44:25,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 884. [2021-07-13 19:44:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-07-13 19:44:25,580 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-07-13 19:44:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:25,580 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-07-13 19:44:25,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-07-13 19:44:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:25,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:25,581 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:25,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3195 [2021-07-13 19:44:25,781 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:25,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:25,782 INFO L82 PathProgramCache]: Analyzing trace with hash 876210668, now seen corresponding path program 178 times [2021-07-13 19:44:25,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:25,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056931964] [2021-07-13 19:44:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:25,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:25,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:25,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056931964] [2021-07-13 19:44:25,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056931964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:25,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762767726] [2021-07-13 19:44:25,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:25,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:25,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:25,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:25,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762767726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:26,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:26,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631026721] [2021-07-13 19:44:26,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:26,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:26,021 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:26,381 INFO L93 Difference]: Finished difference Result 1074 states and 3498 transitions. [2021-07-13 19:44:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:26,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:26,383 INFO L225 Difference]: With dead ends: 1074 [2021-07-13 19:44:26,383 INFO L226 Difference]: Without dead ends: 1074 [2021-07-13 19:44:26,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-07-13 19:44:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 871. [2021-07-13 19:44:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-07-13 19:44:26,394 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-07-13 19:44:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:26,394 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-07-13 19:44:26,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-07-13 19:44:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:26,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:26,395 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:26,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3200,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,596 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163430, now seen corresponding path program 179 times [2021-07-13 19:44:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374677705] [2021-07-13 19:44:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:26,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:26,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374677705] [2021-07-13 19:44:26,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374677705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403485603] [2021-07-13 19:44:26,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:26,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:26,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403485603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:26,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:26,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:26,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001241391] [2021-07-13 19:44:26,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:26,806 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:27,048 INFO L93 Difference]: Finished difference Result 1008 states and 3320 transitions. [2021-07-13 19:44:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:27,050 INFO L225 Difference]: With dead ends: 1008 [2021-07-13 19:44:27,050 INFO L226 Difference]: Without dead ends: 1008 [2021-07-13 19:44:27,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-13 19:44:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 874. [2021-07-13 19:44:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-07-13 19:44:27,061 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-07-13 19:44:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:27,061 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-07-13 19:44:27,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-07-13 19:44:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:27,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:27,063 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:27,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3205,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,263 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -926805212, now seen corresponding path program 180 times [2021-07-13 19:44:27,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:27,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739771997] [2021-07-13 19:44:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:27,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739771997] [2021-07-13 19:44:27,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739771997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958307460] [2021-07-13 19:44:27,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:27,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:27,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:27,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:27,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958307460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:27,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:27,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307478720] [2021-07-13 19:44:27,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:27,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:27,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:27,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:27,479 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:27,726 INFO L93 Difference]: Finished difference Result 1031 states and 3380 transitions. [2021-07-13 19:44:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:27,728 INFO L225 Difference]: With dead ends: 1031 [2021-07-13 19:44:27,728 INFO L226 Difference]: Without dead ends: 1031 [2021-07-13 19:44:27,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:27,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-07-13 19:44:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 871. [2021-07-13 19:44:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4114942528735632) internal successors, (2968), 870 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2968 transitions. [2021-07-13 19:44:27,738 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2968 transitions. Word has length 20 [2021-07-13 19:44:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:27,738 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2968 transitions. [2021-07-13 19:44:27,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2968 transitions. [2021-07-13 19:44:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:27,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:27,740 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:27,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3208 [2021-07-13 19:44:27,940 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:27,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1673472592, now seen corresponding path program 181 times [2021-07-13 19:44:27,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:27,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903150528] [2021-07-13 19:44:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:27,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:27,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903150528] [2021-07-13 19:44:27,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903150528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:27,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610111705] [2021-07-13 19:44:27,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:28,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:28,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610111705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:28,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:28,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745633321] [2021-07-13 19:44:28,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:28,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:28,144 INFO L87 Difference]: Start difference. First operand 871 states and 2968 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:28,483 INFO L93 Difference]: Finished difference Result 1075 states and 3471 transitions. [2021-07-13 19:44:28,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:28,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:28,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:28,485 INFO L225 Difference]: With dead ends: 1075 [2021-07-13 19:44:28,485 INFO L226 Difference]: Without dead ends: 1075 [2021-07-13 19:44:28,485 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:28,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-07-13 19:44:28,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 880. [2021-07-13 19:44:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4175199089874857) internal successors, (3004), 879 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3004 transitions. [2021-07-13 19:44:28,496 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3004 transitions. Word has length 20 [2021-07-13 19:44:28,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:28,496 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3004 transitions. [2021-07-13 19:44:28,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:28,496 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3004 transitions. [2021-07-13 19:44:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:28,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:28,497 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:28,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,698 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:28,698 INFO L82 PathProgramCache]: Analyzing trace with hash 305325820, now seen corresponding path program 182 times [2021-07-13 19:44:28,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:28,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865530990] [2021-07-13 19:44:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:28,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865530990] [2021-07-13 19:44:28,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865530990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139814930] [2021-07-13 19:44:28,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:28,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:28,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:28,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:28,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139814930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:28,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572311939] [2021-07-13 19:44:28,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:28,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:28,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:28,911 INFO L87 Difference]: Start difference. First operand 880 states and 3004 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:29,185 INFO L93 Difference]: Finished difference Result 1003 states and 3305 transitions. [2021-07-13 19:44:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:29,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:29,186 INFO L225 Difference]: With dead ends: 1003 [2021-07-13 19:44:29,186 INFO L226 Difference]: Without dead ends: 991 [2021-07-13 19:44:29,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:29,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-07-13 19:44:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 880. [2021-07-13 19:44:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-07-13 19:44:29,197 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-07-13 19:44:29,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:29,197 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-07-13 19:44:29,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,197 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-07-13 19:44:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:29,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:29,198 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:29,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,398 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash 475323944, now seen corresponding path program 183 times [2021-07-13 19:44:29,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:29,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010125984] [2021-07-13 19:44:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:29,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010125984] [2021-07-13 19:44:29,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010125984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263902798] [2021-07-13 19:44:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:29,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:29,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:29,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:29,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:29,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263902798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:29,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:29,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735518436] [2021-07-13 19:44:29,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:29,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:29,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:29,610 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:29,865 INFO L93 Difference]: Finished difference Result 1012 states and 3329 transitions. [2021-07-13 19:44:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:29,867 INFO L225 Difference]: With dead ends: 1012 [2021-07-13 19:44:29,867 INFO L226 Difference]: Without dead ends: 1012 [2021-07-13 19:44:29,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 232.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:29,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-07-13 19:44:29,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 874. [2021-07-13 19:44:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.40893470790378) internal successors, (2976), 873 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2976 transitions. [2021-07-13 19:44:29,878 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2976 transitions. Word has length 20 [2021-07-13 19:44:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:29,878 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2976 transitions. [2021-07-13 19:44:29,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2976 transitions. [2021-07-13 19:44:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:29,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:29,879 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:30,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-07-13 19:44:30,079 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1887721840, now seen corresponding path program 184 times [2021-07-13 19:44:30,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:30,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929706773] [2021-07-13 19:44:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:30,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929706773] [2021-07-13 19:44:30,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929706773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055965214] [2021-07-13 19:44:30,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:30,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:30,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:30,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055965214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:30,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:30,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805041532] [2021-07-13 19:44:30,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:30,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:30,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:30,333 INFO L87 Difference]: Start difference. First operand 874 states and 2976 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:30,629 INFO L93 Difference]: Finished difference Result 1001 states and 3278 transitions. [2021-07-13 19:44:30,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:30,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:30,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:30,631 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:44:30,631 INFO L226 Difference]: Without dead ends: 987 [2021-07-13 19:44:30,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-07-13 19:44:30,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 874. [2021-07-13 19:44:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4054982817869415) internal successors, (2973), 873 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2973 transitions. [2021-07-13 19:44:30,641 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2973 transitions. Word has length 20 [2021-07-13 19:44:30,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:30,641 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2973 transitions. [2021-07-13 19:44:30,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:30,641 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2973 transitions. [2021-07-13 19:44:30,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:30,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:30,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:30,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,843 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -470577356, now seen corresponding path program 185 times [2021-07-13 19:44:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:30,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230644945] [2021-07-13 19:44:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:30,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:30,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230644945] [2021-07-13 19:44:30,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230644945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:30,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593476106] [2021-07-13 19:44:30,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:30,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:30,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:30,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:30,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593476106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:31,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337267529] [2021-07-13 19:44:31,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:31,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:31,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:31,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:31,087 INFO L87 Difference]: Start difference. First operand 874 states and 2973 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:31,328 INFO L93 Difference]: Finished difference Result 1011 states and 3308 transitions. [2021-07-13 19:44:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:31,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:31,330 INFO L225 Difference]: With dead ends: 1011 [2021-07-13 19:44:31,330 INFO L226 Difference]: Without dead ends: 1011 [2021-07-13 19:44:31,330 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:31,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-07-13 19:44:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-07-13 19:44:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-07-13 19:44:31,341 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-07-13 19:44:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:31,341 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-07-13 19:44:31,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-07-13 19:44:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:31,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:31,342 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:31,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3230 [2021-07-13 19:44:31,542 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -2049796036, now seen corresponding path program 186 times [2021-07-13 19:44:31,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:31,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566040446] [2021-07-13 19:44:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566040446] [2021-07-13 19:44:31,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566040446] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550311401] [2021-07-13 19:44:31,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:31,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:44:31,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:31,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:31,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550311401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:31,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:31,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307423055] [2021-07-13 19:44:31,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:31,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:31,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:31,750 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:31,976 INFO L93 Difference]: Finished difference Result 1030 states and 3364 transitions. [2021-07-13 19:44:31,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:31,978 INFO L225 Difference]: With dead ends: 1030 [2021-07-13 19:44:31,978 INFO L226 Difference]: Without dead ends: 1030 [2021-07-13 19:44:31,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-07-13 19:44:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 871. [2021-07-13 19:44:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-07-13 19:44:31,988 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-07-13 19:44:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:31,988 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-07-13 19:44:31,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:31,989 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-07-13 19:44:31,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:31,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:31,990 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:32,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,190 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:32,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1256631376, now seen corresponding path program 187 times [2021-07-13 19:44:32,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:32,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994625548] [2021-07-13 19:44:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:32,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994625548] [2021-07-13 19:44:32,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994625548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866101254] [2021-07-13 19:44:32,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866101254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:32,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:32,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118383940] [2021-07-13 19:44:32,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:32,416 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:32,656 INFO L93 Difference]: Finished difference Result 996 states and 3273 transitions. [2021-07-13 19:44:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:32,658 INFO L225 Difference]: With dead ends: 996 [2021-07-13 19:44:32,658 INFO L226 Difference]: Without dead ends: 996 [2021-07-13 19:44:32,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 256.4ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:32,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-07-13 19:44:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 868. [2021-07-13 19:44:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4071510957324107) internal successors, (2954), 867 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2954 transitions. [2021-07-13 19:44:32,668 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2954 transitions. Word has length 20 [2021-07-13 19:44:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:32,668 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2954 transitions. [2021-07-13 19:44:32,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2954 transitions. [2021-07-13 19:44:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:32,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:32,669 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:32,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-07-13 19:44:32,870 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:32,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1922977178, now seen corresponding path program 188 times [2021-07-13 19:44:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:32,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272241328] [2021-07-13 19:44:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:32,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272241328] [2021-07-13 19:44:32,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272241328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:32,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805816182] [2021-07-13 19:44:32,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:32,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:32,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:32,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805816182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587262858] [2021-07-13 19:44:33,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:33,093 INFO L87 Difference]: Start difference. First operand 868 states and 2954 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:33,329 INFO L93 Difference]: Finished difference Result 1048 states and 3390 transitions. [2021-07-13 19:44:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:33,331 INFO L225 Difference]: With dead ends: 1048 [2021-07-13 19:44:33,331 INFO L226 Difference]: Without dead ends: 1041 [2021-07-13 19:44:33,331 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-07-13 19:44:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 887. [2021-07-13 19:44:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-07-13 19:44:33,342 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-07-13 19:44:33,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:33,342 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-07-13 19:44:33,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-07-13 19:44:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:33,343 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:33,343 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:33,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,544 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:33,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:33,544 INFO L82 PathProgramCache]: Analyzing trace with hash 138387140, now seen corresponding path program 189 times [2021-07-13 19:44:33,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:33,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754230552] [2021-07-13 19:44:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754230552] [2021-07-13 19:44:33,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754230552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110511479] [2021-07-13 19:44:33,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:33,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:33,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:33,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110511479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:33,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:33,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:33,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979026545] [2021-07-13 19:44:33,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:33,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:33,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:33,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:33,777 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:34,029 INFO L93 Difference]: Finished difference Result 1045 states and 3392 transitions. [2021-07-13 19:44:34,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:34,029 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:34,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:34,031 INFO L225 Difference]: With dead ends: 1045 [2021-07-13 19:44:34,031 INFO L226 Difference]: Without dead ends: 1045 [2021-07-13 19:44:34,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-07-13 19:44:34,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-07-13 19:44:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.404063205417607) internal successors, (3016), 886 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3016 transitions. [2021-07-13 19:44:34,042 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3016 transitions. Word has length 20 [2021-07-13 19:44:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:34,042 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3016 transitions. [2021-07-13 19:44:34,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3016 transitions. [2021-07-13 19:44:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:34,043 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:34,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:34,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,244 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:34,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:34,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1922472662, now seen corresponding path program 190 times [2021-07-13 19:44:34,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:34,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251164104] [2021-07-13 19:44:34,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:34,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251164104] [2021-07-13 19:44:34,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251164104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018236975] [2021-07-13 19:44:34,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:34,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:34,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:34,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018236975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:34,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:34,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:34,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577228982] [2021-07-13 19:44:34,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:34,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:34,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:34,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:34,459 INFO L87 Difference]: Start difference. First operand 887 states and 3016 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:34,796 INFO L93 Difference]: Finished difference Result 1051 states and 3399 transitions. [2021-07-13 19:44:34,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:34,798 INFO L225 Difference]: With dead ends: 1051 [2021-07-13 19:44:34,798 INFO L226 Difference]: Without dead ends: 1045 [2021-07-13 19:44:34,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-07-13 19:44:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 887. [2021-07-13 19:44:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-07-13 19:44:34,809 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-07-13 19:44:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:34,809 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-07-13 19:44:34,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-07-13 19:44:34,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:34,810 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:34,810 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:35,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3256 [2021-07-13 19:44:35,011 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:35,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:35,011 INFO L82 PathProgramCache]: Analyzing trace with hash 931551800, now seen corresponding path program 191 times [2021-07-13 19:44:35,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:35,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091769494] [2021-07-13 19:44:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:35,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091769494] [2021-07-13 19:44:35,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091769494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861520601] [2021-07-13 19:44:35,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:35,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:35,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:35,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:35,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861520601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:35,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:35,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120440778] [2021-07-13 19:44:35,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:35,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:35,219 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:35,525 INFO L93 Difference]: Finished difference Result 1050 states and 3400 transitions. [2021-07-13 19:44:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:35,527 INFO L225 Difference]: With dead ends: 1050 [2021-07-13 19:44:35,527 INFO L226 Difference]: Without dead ends: 1050 [2021-07-13 19:44:35,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:35,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-13 19:44:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-07-13 19:44:35,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.40317100792752) internal successors, (3005), 883 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3005 transitions. [2021-07-13 19:44:35,539 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3005 transitions. Word has length 20 [2021-07-13 19:44:35,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:35,539 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3005 transitions. [2021-07-13 19:44:35,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3005 transitions. [2021-07-13 19:44:35,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:35,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:35,540 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:35,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-07-13 19:44:35,740 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:35,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1384617084, now seen corresponding path program 192 times [2021-07-13 19:44:35,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:35,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200084243] [2021-07-13 19:44:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200084243] [2021-07-13 19:44:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200084243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587073855] [2021-07-13 19:44:35,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:35,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:35,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:35,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:35,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587073855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190451931] [2021-07-13 19:44:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:35,974 INFO L87 Difference]: Start difference. First operand 884 states and 3005 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:36,266 INFO L93 Difference]: Finished difference Result 1009 states and 3304 transitions. [2021-07-13 19:44:36,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:36,266 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:36,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:36,268 INFO L225 Difference]: With dead ends: 1009 [2021-07-13 19:44:36,268 INFO L226 Difference]: Without dead ends: 997 [2021-07-13 19:44:36,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-07-13 19:44:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 884. [2021-07-13 19:44:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.3997734994337487) internal successors, (3002), 883 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3002 transitions. [2021-07-13 19:44:36,279 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3002 transitions. Word has length 20 [2021-07-13 19:44:36,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:36,279 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3002 transitions. [2021-07-13 19:44:36,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,279 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3002 transitions. [2021-07-13 19:44:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:36,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:36,281 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:36,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:36,482 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:36,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:36,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1214618960, now seen corresponding path program 193 times [2021-07-13 19:44:36,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:36,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972666333] [2021-07-13 19:44:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:36,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972666333] [2021-07-13 19:44:36,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972666333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105007604] [2021-07-13 19:44:36,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:36,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:36,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:36,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105007604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:36,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:36,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:36,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744568878] [2021-07-13 19:44:36,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:36,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:36,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:36,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:36,685 INFO L87 Difference]: Start difference. First operand 884 states and 3002 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:36,930 INFO L93 Difference]: Finished difference Result 1011 states and 3313 transitions. [2021-07-13 19:44:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:36,932 INFO L225 Difference]: With dead ends: 1011 [2021-07-13 19:44:36,932 INFO L226 Difference]: Without dead ends: 1011 [2021-07-13 19:44:36,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-07-13 19:44:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 871. [2021-07-13 19:44:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.4045977011494255) internal successors, (2962), 870 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2962 transitions. [2021-07-13 19:44:36,943 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2962 transitions. Word has length 20 [2021-07-13 19:44:36,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:36,943 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2962 transitions. [2021-07-13 19:44:36,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:36,944 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2962 transitions. [2021-07-13 19:44:36,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:36,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:36,945 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:37,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-07-13 19:44:37,145 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:37,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:37,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1043292698, now seen corresponding path program 194 times [2021-07-13 19:44:37,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:37,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099644059] [2021-07-13 19:44:37,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099644059] [2021-07-13 19:44:37,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099644059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163718462] [2021-07-13 19:44:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:37,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:37,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163718462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:37,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:37,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607172316] [2021-07-13 19:44:37,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:37,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:37,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:37,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:37,352 INFO L87 Difference]: Start difference. First operand 871 states and 2962 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:37,611 INFO L93 Difference]: Finished difference Result 1151 states and 3681 transitions. [2021-07-13 19:44:37,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:37,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:37,613 INFO L225 Difference]: With dead ends: 1151 [2021-07-13 19:44:37,613 INFO L226 Difference]: Without dead ends: 1144 [2021-07-13 19:44:37,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:37,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-13 19:44:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 893. [2021-07-13 19:44:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-07-13 19:44:37,624 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-07-13 19:44:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-07-13 19:44:37,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-07-13 19:44:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:37,626 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:37,626 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:37,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-07-13 19:44:37,826 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:37,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1190310280, now seen corresponding path program 195 times [2021-07-13 19:44:37,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:37,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998694654] [2021-07-13 19:44:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:37,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:37,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:37,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998694654] [2021-07-13 19:44:37,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998694654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:37,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845349709] [2021-07-13 19:44:37,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:37,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:37,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:37,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:37,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845349709] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:38,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:38,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702823427] [2021-07-13 19:44:38,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:38,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:38,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:38,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:38,064 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:38,402 INFO L93 Difference]: Finished difference Result 1136 states and 3648 transitions. [2021-07-13 19:44:38,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:38,402 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:38,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:38,404 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 19:44:38,404 INFO L226 Difference]: Without dead ends: 1136 [2021-07-13 19:44:38,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 338.8ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-13 19:44:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-07-13 19:44:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4024663677130045) internal successors, (3035), 892 states have internal predecessors, (3035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3035 transitions. [2021-07-13 19:44:38,415 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3035 transitions. Word has length 20 [2021-07-13 19:44:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:38,415 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3035 transitions. [2021-07-13 19:44:38,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3035 transitions. [2021-07-13 19:44:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:38,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:38,416 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:38,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,617 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1043797214, now seen corresponding path program 196 times [2021-07-13 19:44:38,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:38,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117646859] [2021-07-13 19:44:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:38,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117646859] [2021-07-13 19:44:38,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117646859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649078423] [2021-07-13 19:44:38,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:38,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:38,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:38,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:38,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649078423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:38,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:38,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:38,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104206809] [2021-07-13 19:44:38,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:38,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:38,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:38,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:38,848 INFO L87 Difference]: Start difference. First operand 893 states and 3035 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:39,256 INFO L93 Difference]: Finished difference Result 1142 states and 3655 transitions. [2021-07-13 19:44:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:39,256 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:39,258 INFO L225 Difference]: With dead ends: 1142 [2021-07-13 19:44:39,258 INFO L226 Difference]: Without dead ends: 1136 [2021-07-13 19:44:39,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:39,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-13 19:44:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 893. [2021-07-13 19:44:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.399103139013453) internal successors, (3032), 892 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3032 transitions. [2021-07-13 19:44:39,269 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3032 transitions. Word has length 20 [2021-07-13 19:44:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:39,269 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3032 transitions. [2021-07-13 19:44:39,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3032 transitions. [2021-07-13 19:44:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:39,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:39,271 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:39,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-07-13 19:44:39,471 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -397145620, now seen corresponding path program 197 times [2021-07-13 19:44:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:39,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831841297] [2021-07-13 19:44:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831841297] [2021-07-13 19:44:39,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831841297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471445248] [2021-07-13 19:44:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:39,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:39,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:39,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471445248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:39,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:39,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371907761] [2021-07-13 19:44:39,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:39,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:39,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:39,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:39,681 INFO L87 Difference]: Start difference. First operand 893 states and 3032 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:40,010 INFO L93 Difference]: Finished difference Result 1153 states and 3691 transitions. [2021-07-13 19:44:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:40,012 INFO L225 Difference]: With dead ends: 1153 [2021-07-13 19:44:40,012 INFO L226 Difference]: Without dead ends: 1153 [2021-07-13 19:44:40,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:40,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-13 19:44:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-07-13 19:44:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4015748031496065) internal successors, (3024), 889 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3024 transitions. [2021-07-13 19:44:40,024 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3024 transitions. Word has length 20 [2021-07-13 19:44:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3024 transitions. [2021-07-13 19:44:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3024 transitions. [2021-07-13 19:44:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:40,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:40,025 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:40,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-07-13 19:44:40,226 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:40,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:40,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1581652792, now seen corresponding path program 198 times [2021-07-13 19:44:40,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:40,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812246300] [2021-07-13 19:44:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:40,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812246300] [2021-07-13 19:44:40,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812246300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457568159] [2021-07-13 19:44:40,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:40,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:40,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457568159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:40,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:40,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444492750] [2021-07-13 19:44:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:40,471 INFO L87 Difference]: Start difference. First operand 890 states and 3024 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:40,822 INFO L93 Difference]: Finished difference Result 1106 states and 3573 transitions. [2021-07-13 19:44:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:40,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:40,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:40,824 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 19:44:40,824 INFO L226 Difference]: Without dead ends: 1094 [2021-07-13 19:44:40,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:40,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-13 19:44:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 890. [2021-07-13 19:44:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.3982002249718786) internal successors, (3021), 889 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3021 transitions. [2021-07-13 19:44:40,835 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3021 transitions. Word has length 20 [2021-07-13 19:44:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:40,835 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3021 transitions. [2021-07-13 19:44:40,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3021 transitions. [2021-07-13 19:44:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:40,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:40,836 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-07-13 19:44:41,036 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1751650916, now seen corresponding path program 199 times [2021-07-13 19:44:41,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196920768] [2021-07-13 19:44:41,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:41,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196920768] [2021-07-13 19:44:41,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196920768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890919527] [2021-07-13 19:44:41,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890919527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:41,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:41,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507919221] [2021-07-13 19:44:41,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:41,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:41,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:41,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:41,231 INFO L87 Difference]: Start difference. First operand 890 states and 3021 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:41,502 INFO L93 Difference]: Finished difference Result 1139 states and 3670 transitions. [2021-07-13 19:44:41,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:41,505 INFO L225 Difference]: With dead ends: 1139 [2021-07-13 19:44:41,505 INFO L226 Difference]: Without dead ends: 1139 [2021-07-13 19:44:41,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:41,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-07-13 19:44:41,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 887. [2021-07-13 19:44:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.4006772009029347) internal successors, (3013), 886 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3013 transitions. [2021-07-13 19:44:41,517 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3013 transitions. Word has length 20 [2021-07-13 19:44:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:41,517 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3013 transitions. [2021-07-13 19:44:41,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3013 transitions. [2021-07-13 19:44:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:41,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:41,518 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:41,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,719 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:41,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:41,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2125569182, now seen corresponding path program 200 times [2021-07-13 19:44:41,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:41,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591606691] [2021-07-13 19:44:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:41,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591606691] [2021-07-13 19:44:41,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591606691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642433673] [2021-07-13 19:44:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:41,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:41,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642433673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:41,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:41,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:41,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688014321] [2021-07-13 19:44:41,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:41,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:41,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:41,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:41,935 INFO L87 Difference]: Start difference. First operand 887 states and 3013 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:42,269 INFO L93 Difference]: Finished difference Result 1097 states and 3549 transitions. [2021-07-13 19:44:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:42,271 INFO L225 Difference]: With dead ends: 1097 [2021-07-13 19:44:42,271 INFO L226 Difference]: Without dead ends: 1079 [2021-07-13 19:44:42,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 300.7ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:44:42,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-07-13 19:44:42,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 887. [2021-07-13 19:44:42,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3972911963882617) internal successors, (3010), 886 states have internal predecessors, (3010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3010 transitions. [2021-07-13 19:44:42,282 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3010 transitions. Word has length 20 [2021-07-13 19:44:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:42,282 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3010 transitions. [2021-07-13 19:44:42,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3010 transitions. [2021-07-13 19:44:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:42,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:42,283 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:42,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,484 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:42,484 INFO L82 PathProgramCache]: Analyzing trace with hash 738958384, now seen corresponding path program 201 times [2021-07-13 19:44:42,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:42,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240561419] [2021-07-13 19:44:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240561419] [2021-07-13 19:44:42,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240561419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196926281] [2021-07-13 19:44:42,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:42,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:42,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196926281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:42,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:42,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:44:42,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137222178] [2021-07-13 19:44:42,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:44:42,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:42,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:44:42,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:44:42,684 INFO L87 Difference]: Start difference. First operand 887 states and 3010 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:42,939 INFO L93 Difference]: Finished difference Result 1159 states and 3711 transitions. [2021-07-13 19:44:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:42,940 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:42,941 INFO L225 Difference]: With dead ends: 1159 [2021-07-13 19:44:42,941 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 19:44:42,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:44:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 19:44:42,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 871. [2021-07-13 19:44:42,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-07-13 19:44:42,952 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-07-13 19:44:42,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:42,952 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-07-13 19:44:42,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:42,952 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-07-13 19:44:42,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:42,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:42,954 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:43,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-07-13 19:44:43,165 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:43,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:43,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1803358238, now seen corresponding path program 202 times [2021-07-13 19:44:43,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:43,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535183201] [2021-07-13 19:44:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535183201] [2021-07-13 19:44:43,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535183201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567963053] [2021-07-13 19:44:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:43,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:43,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:43,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567963053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:43,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:43,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:44:43,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834576857] [2021-07-13 19:44:43,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:44:43,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:43,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:44:43,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:44:43,368 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:43,736 INFO L93 Difference]: Finished difference Result 1282 states and 4043 transitions. [2021-07-13 19:44:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:43,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:43,739 INFO L225 Difference]: With dead ends: 1282 [2021-07-13 19:44:43,739 INFO L226 Difference]: Without dead ends: 1282 [2021-07-13 19:44:43,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:44:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-13 19:44:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 871. [2021-07-13 19:44:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-07-13 19:44:43,751 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-07-13 19:44:43,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:43,751 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-07-13 19:44:43,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-07-13 19:44:43,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:43,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:43,752 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:43,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:43,953 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 672713702, now seen corresponding path program 203 times [2021-07-13 19:44:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:43,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517431426] [2021-07-13 19:44:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517431426] [2021-07-13 19:44:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517431426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825006362] [2021-07-13 19:44:44,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:44,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825006362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:44,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064398070] [2021-07-13 19:44:44,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:44,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:44,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:44,220 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:44,638 INFO L93 Difference]: Finished difference Result 1117 states and 3611 transitions. [2021-07-13 19:44:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:44,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:44,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:44,640 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:44:44,640 INFO L226 Difference]: Without dead ends: 1103 [2021-07-13 19:44:44,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:44,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-07-13 19:44:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 871. [2021-07-13 19:44:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.401149425287356) internal successors, (2959), 870 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2959 transitions. [2021-07-13 19:44:44,651 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2959 transitions. Word has length 20 [2021-07-13 19:44:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:44,651 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2959 transitions. [2021-07-13 19:44:44,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2959 transitions. [2021-07-13 19:44:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:44,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:44,652 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:44,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,852 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash -245147176, now seen corresponding path program 204 times [2021-07-13 19:44:44,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:44,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258731069] [2021-07-13 19:44:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:44,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258731069] [2021-07-13 19:44:44,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258731069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:44,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966577432] [2021-07-13 19:44:44,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:44,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:44,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:44,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966577432] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:45,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623790525] [2021-07-13 19:44:45,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:45,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:45,075 INFO L87 Difference]: Start difference. First operand 871 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:45,579 INFO L93 Difference]: Finished difference Result 1319 states and 4131 transitions. [2021-07-13 19:44:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:45,582 INFO L225 Difference]: With dead ends: 1319 [2021-07-13 19:44:45,582 INFO L226 Difference]: Without dead ends: 1319 [2021-07-13 19:44:45,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:45,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-07-13 19:44:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 874. [2021-07-13 19:44:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.3986254295532645) internal successors, (2967), 873 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2967 transitions. [2021-07-13 19:44:45,593 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2967 transitions. Word has length 20 [2021-07-13 19:44:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:45,594 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2967 transitions. [2021-07-13 19:44:45,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2967 transitions. [2021-07-13 19:44:45,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:45,595 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:45,595 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:45,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-07-13 19:44:45,795 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:45,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:45,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1031201196, now seen corresponding path program 205 times [2021-07-13 19:44:45,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:45,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950809946] [2021-07-13 19:44:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:45,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950809946] [2021-07-13 19:44:45,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950809946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:45,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087296868] [2021-07-13 19:44:45,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087296868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:46,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:46,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022337584] [2021-07-13 19:44:46,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:46,057 INFO L87 Difference]: Start difference. First operand 874 states and 2967 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:46,603 INFO L93 Difference]: Finished difference Result 1152 states and 3694 transitions. [2021-07-13 19:44:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:46,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:46,605 INFO L225 Difference]: With dead ends: 1152 [2021-07-13 19:44:46,605 INFO L226 Difference]: Without dead ends: 1145 [2021-07-13 19:44:46,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 537.0ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:44:46,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-13 19:44:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 887. [2021-07-13 19:44:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-07-13 19:44:46,617 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-07-13 19:44:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:46,617 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-07-13 19:44:46,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-07-13 19:44:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:46,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:46,618 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:46,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-07-13 19:44:46,819 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:46,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:46,819 INFO L82 PathProgramCache]: Analyzing trace with hash 463211042, now seen corresponding path program 206 times [2021-07-13 19:44:46,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:46,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34171669] [2021-07-13 19:44:46,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:46,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34171669] [2021-07-13 19:44:46,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34171669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:46,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523242660] [2021-07-13 19:44:46,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:46,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:46,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:46,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:47,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523242660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:47,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:47,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:47,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016989745] [2021-07-13 19:44:47,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:47,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:47,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:47,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:47,045 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:47,907 INFO L93 Difference]: Finished difference Result 1414 states and 4369 transitions. [2021-07-13 19:44:47,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:44:47,908 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:47,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:47,910 INFO L225 Difference]: With dead ends: 1414 [2021-07-13 19:44:47,910 INFO L226 Difference]: Without dead ends: 1414 [2021-07-13 19:44:47,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 776.8ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:44:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-13 19:44:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 887. [2021-07-13 19:44:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.393905191873589) internal successors, (3007), 886 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3007 transitions. [2021-07-13 19:44:47,923 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3007 transitions. Word has length 20 [2021-07-13 19:44:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:47,923 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3007 transitions. [2021-07-13 19:44:47,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3007 transitions. [2021-07-13 19:44:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:47,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:47,924 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:48,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3328 [2021-07-13 19:44:48,125 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1030696680, now seen corresponding path program 207 times [2021-07-13 19:44:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:48,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553822345] [2021-07-13 19:44:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:48,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553822345] [2021-07-13 19:44:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553822345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887985989] [2021-07-13 19:44:48,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:48,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:48,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887985989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:48,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:48,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103349819] [2021-07-13 19:44:48,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:48,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:48,350 INFO L87 Difference]: Start difference. First operand 887 states and 3007 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:48,810 INFO L93 Difference]: Finished difference Result 1308 states and 4100 transitions. [2021-07-13 19:44:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:48,812 INFO L225 Difference]: With dead ends: 1308 [2021-07-13 19:44:48,812 INFO L226 Difference]: Without dead ends: 1302 [2021-07-13 19:44:48,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 409.6ms TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-07-13 19:44:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 887. [2021-07-13 19:44:48,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.3905191873589167) internal successors, (3004), 886 states have internal predecessors, (3004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3004 transitions. [2021-07-13 19:44:48,825 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3004 transitions. Word has length 20 [2021-07-13 19:44:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:48,825 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3004 transitions. [2021-07-13 19:44:48,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3004 transitions. [2021-07-13 19:44:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:48,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:48,826 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:49,026 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1823327782, now seen corresponding path program 208 times [2021-07-13 19:44:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883864257] [2021-07-13 19:44:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883864257] [2021-07-13 19:44:49,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883864257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321185633] [2021-07-13 19:44:49,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:49,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:49,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:49,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:49,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321185633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:49,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:49,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721047743] [2021-07-13 19:44:49,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:49,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:49,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:49,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:49,288 INFO L87 Difference]: Start difference. First operand 887 states and 3004 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:49,659 INFO L93 Difference]: Finished difference Result 1115 states and 3617 transitions. [2021-07-13 19:44:49,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:49,659 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:49,661 INFO L225 Difference]: With dead ends: 1115 [2021-07-13 19:44:49,661 INFO L226 Difference]: Without dead ends: 1115 [2021-07-13 19:44:49,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-07-13 19:44:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 866. [2021-07-13 19:44:49,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4057803468208094) internal successors, (2946), 865 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2946 transitions. [2021-07-13 19:44:49,672 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2946 transitions. Word has length 20 [2021-07-13 19:44:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:49,672 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2946 transitions. [2021-07-13 19:44:49,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2946 transitions. [2021-07-13 19:44:49,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:49,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:49,673 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:49,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-07-13 19:44:49,874 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:49,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:49,874 INFO L82 PathProgramCache]: Analyzing trace with hash 229814562, now seen corresponding path program 209 times [2021-07-13 19:44:49,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:49,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275123654] [2021-07-13 19:44:49,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:49,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:49,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275123654] [2021-07-13 19:44:49,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275123654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:49,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307258300] [2021-07-13 19:44:49,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307258300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:50,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565600148] [2021-07-13 19:44:50,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:50,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:50,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:50,135 INFO L87 Difference]: Start difference. First operand 866 states and 2946 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:50,452 INFO L93 Difference]: Finished difference Result 1035 states and 3386 transitions. [2021-07-13 19:44:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:50,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:50,453 INFO L225 Difference]: With dead ends: 1035 [2021-07-13 19:44:50,453 INFO L226 Difference]: Without dead ends: 1021 [2021-07-13 19:44:50,454 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2021-07-13 19:44:50,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 863. [2021-07-13 19:44:50,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-07-13 19:44:50,464 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-07-13 19:44:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:50,464 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-07-13 19:44:50,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-07-13 19:44:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:50,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:50,466 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:50,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,666 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:50,666 INFO L82 PathProgramCache]: Analyzing trace with hash -688046316, now seen corresponding path program 210 times [2021-07-13 19:44:50,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:50,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001700306] [2021-07-13 19:44:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:50,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001700306] [2021-07-13 19:44:50,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001700306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502341200] [2021-07-13 19:44:50,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:50,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:50,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:50,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:50,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502341200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:50,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:50,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:50,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249935196] [2021-07-13 19:44:50,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:50,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:50,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:50,897 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:51,233 INFO L93 Difference]: Finished difference Result 1127 states and 3620 transitions. [2021-07-13 19:44:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:51,235 INFO L225 Difference]: With dead ends: 1127 [2021-07-13 19:44:51,235 INFO L226 Difference]: Without dead ends: 1127 [2021-07-13 19:44:51,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-07-13 19:44:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 866. [2021-07-13 19:44:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.4023121387283237) internal successors, (2943), 865 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2943 transitions. [2021-07-13 19:44:51,246 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2943 transitions. Word has length 20 [2021-07-13 19:44:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:51,246 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2943 transitions. [2021-07-13 19:44:51,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2943 transitions. [2021-07-13 19:44:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:51,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:51,247 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:51,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-07-13 19:44:51,447 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:51,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:51,448 INFO L82 PathProgramCache]: Analyzing trace with hash 20311902, now seen corresponding path program 211 times [2021-07-13 19:44:51,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:51,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362573909] [2021-07-13 19:44:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:51,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362573909] [2021-07-13 19:44:51,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362573909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041806540] [2021-07-13 19:44:51,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:51,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:51,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:51,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041806540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:51,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:51,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460601456] [2021-07-13 19:44:51,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:51,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:51,691 INFO L87 Difference]: Start difference. First operand 866 states and 2943 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,111 INFO L93 Difference]: Finished difference Result 1165 states and 3732 transitions. [2021-07-13 19:44:52,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:44:52,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:52,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,113 INFO L225 Difference]: With dead ends: 1165 [2021-07-13 19:44:52,113 INFO L226 Difference]: Without dead ends: 1165 [2021-07-13 19:44:52,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 389.2ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:44:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-13 19:44:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 863. [2021-07-13 19:44:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4048723897911835) internal successors, (2935), 862 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2935 transitions. [2021-07-13 19:44:52,125 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2935 transitions. Word has length 20 [2021-07-13 19:44:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,125 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2935 transitions. [2021-07-13 19:44:52,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2935 transitions. [2021-07-13 19:44:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:52,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,126 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:52,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-07-13 19:44:52,326 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash 714082840, now seen corresponding path program 212 times [2021-07-13 19:44:52,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:52,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126434917] [2021-07-13 19:44:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:52,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126434917] [2021-07-13 19:44:52,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126434917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541942541] [2021-07-13 19:44:52,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:52,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:52,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:52,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:52,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541942541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:52,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:52,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:52,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978806068] [2021-07-13 19:44:52,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:52,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:52,574 INFO L87 Difference]: Start difference. First operand 863 states and 2935 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:52,866 INFO L93 Difference]: Finished difference Result 1085 states and 3509 transitions. [2021-07-13 19:44:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:52,868 INFO L225 Difference]: With dead ends: 1085 [2021-07-13 19:44:52,868 INFO L226 Difference]: Without dead ends: 1078 [2021-07-13 19:44:52,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:52,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-07-13 19:44:52,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 882. [2021-07-13 19:44:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-07-13 19:44:52,879 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-07-13 19:44:52,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:52,879 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-07-13 19:44:52,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-07-13 19:44:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:52,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:52,880 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:53,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,081 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:53,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1519520138, now seen corresponding path program 213 times [2021-07-13 19:44:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:53,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322984806] [2021-07-13 19:44:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:53,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322984806] [2021-07-13 19:44:53,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322984806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719509707] [2021-07-13 19:44:53,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:53,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:44:53,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:53,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:53,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719509707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:53,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:53,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844976626] [2021-07-13 19:44:53,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:53,332 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:53,723 INFO L93 Difference]: Finished difference Result 1168 states and 3719 transitions. [2021-07-13 19:44:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:53,725 INFO L225 Difference]: With dead ends: 1168 [2021-07-13 19:44:53,725 INFO L226 Difference]: Without dead ends: 1168 [2021-07-13 19:44:53,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 340.0ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-13 19:44:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 882. [2021-07-13 19:44:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.401816118047673) internal successors, (2997), 881 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2997 transitions. [2021-07-13 19:44:53,737 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2997 transitions. Word has length 20 [2021-07-13 19:44:53,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:53,737 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2997 transitions. [2021-07-13 19:44:53,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2997 transitions. [2021-07-13 19:44:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:53,739 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:53,739 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:53,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-07-13 19:44:53,939 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:53,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:53,940 INFO L82 PathProgramCache]: Analyzing trace with hash 714587356, now seen corresponding path program 214 times [2021-07-13 19:44:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:53,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074072130] [2021-07-13 19:44:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074072130] [2021-07-13 19:44:54,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074072130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190370598] [2021-07-13 19:44:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:54,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190370598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:54,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080014230] [2021-07-13 19:44:54,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:54,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:54,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:54,204 INFO L87 Difference]: Start difference. First operand 882 states and 2997 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:54,676 INFO L93 Difference]: Finished difference Result 1181 states and 3743 transitions. [2021-07-13 19:44:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:44:54,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:54,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:54,678 INFO L225 Difference]: With dead ends: 1181 [2021-07-13 19:44:54,678 INFO L226 Difference]: Without dead ends: 1175 [2021-07-13 19:44:54,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-13 19:44:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 882. [2021-07-13 19:44:54,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.398410896708286) internal successors, (2994), 881 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2994 transitions. [2021-07-13 19:44:54,690 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2994 transitions. Word has length 20 [2021-07-13 19:44:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:54,690 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 2994 transitions. [2021-07-13 19:44:54,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2994 transitions. [2021-07-13 19:44:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:54,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:54,691 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:54,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:54,892 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:54,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:54,892 INFO L82 PathProgramCache]: Analyzing trace with hash -726355478, now seen corresponding path program 215 times [2021-07-13 19:44:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:54,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206789370] [2021-07-13 19:44:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:54,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206789370] [2021-07-13 19:44:54,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206789370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:54,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230042094] [2021-07-13 19:44:54,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:44:55,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:55,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230042094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63060521] [2021-07-13 19:44:55,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:55,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:55,137 INFO L87 Difference]: Start difference. First operand 882 states and 2994 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:55,465 INFO L93 Difference]: Finished difference Result 1087 states and 3519 transitions. [2021-07-13 19:44:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:44:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:55,467 INFO L225 Difference]: With dead ends: 1087 [2021-07-13 19:44:55,467 INFO L226 Difference]: Without dead ends: 1087 [2021-07-13 19:44:55,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-13 19:44:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 879. [2021-07-13 19:44:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.4009111617312073) internal successors, (2986), 878 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2986 transitions. [2021-07-13 19:44:55,478 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2986 transitions. Word has length 20 [2021-07-13 19:44:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:55,478 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2986 transitions. [2021-07-13 19:44:55,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2986 transitions. [2021-07-13 19:44:55,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:55,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:55,479 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:55,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-07-13 19:44:55,685 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:55,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1252442934, now seen corresponding path program 216 times [2021-07-13 19:44:55,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:55,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418606287] [2021-07-13 19:44:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:55,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418606287] [2021-07-13 19:44:55,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418606287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913000238] [2021-07-13 19:44:55,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:55,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:44:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:55,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913000238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:55,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:55,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810720950] [2021-07-13 19:44:55,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:55,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:55,939 INFO L87 Difference]: Start difference. First operand 879 states and 2986 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:56,280 INFO L93 Difference]: Finished difference Result 1124 states and 3611 transitions. [2021-07-13 19:44:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:56,282 INFO L225 Difference]: With dead ends: 1124 [2021-07-13 19:44:56,282 INFO L226 Difference]: Without dead ends: 1112 [2021-07-13 19:44:56,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:44:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-07-13 19:44:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 879. [2021-07-13 19:44:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.39749430523918) internal successors, (2983), 878 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2983 transitions. [2021-07-13 19:44:56,293 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2983 transitions. Word has length 20 [2021-07-13 19:44:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:56,294 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2983 transitions. [2021-07-13 19:44:56,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2983 transitions. [2021-07-13 19:44:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:56,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:56,295 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:56,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,497 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:56,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:56,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1422441058, now seen corresponding path program 217 times [2021-07-13 19:44:56,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:56,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831123291] [2021-07-13 19:44:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:56,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831123291] [2021-07-13 19:44:56,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831123291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063324619] [2021-07-13 19:44:56,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:56,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:56,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:56,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063324619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:56,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:56,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:56,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390456516] [2021-07-13 19:44:56,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:56,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:56,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:56,746 INFO L87 Difference]: Start difference. First operand 879 states and 2983 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,002 INFO L93 Difference]: Finished difference Result 1048 states and 3432 transitions. [2021-07-13 19:44:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:44:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,005 INFO L225 Difference]: With dead ends: 1048 [2021-07-13 19:44:57,005 INFO L226 Difference]: Without dead ends: 1048 [2021-07-13 19:44:57,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-07-13 19:44:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 860. [2021-07-13 19:44:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4074505238649593) internal successors, (2927), 859 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2927 transitions. [2021-07-13 19:44:57,024 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2927 transitions. Word has length 20 [2021-07-13 19:44:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,024 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2927 transitions. [2021-07-13 19:44:57,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2927 transitions. [2021-07-13 19:44:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:57,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,026 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:57,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3380,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,226 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2092510764, now seen corresponding path program 218 times [2021-07-13 19:44:57,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:57,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096168512] [2021-07-13 19:44:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:57,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096168512] [2021-07-13 19:44:57,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096168512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642539171] [2021-07-13 19:44:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:57,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:44:57,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:57,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:57,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642539171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:57,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:57,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:44:57,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066563961] [2021-07-13 19:44:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:44:57,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:57,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:44:57,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:44:57,472 INFO L87 Difference]: Start difference. First operand 860 states and 2927 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:57,885 INFO L93 Difference]: Finished difference Result 1395 states and 4367 transitions. [2021-07-13 19:44:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:44:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:57,887 INFO L225 Difference]: With dead ends: 1395 [2021-07-13 19:44:57,887 INFO L226 Difference]: Without dead ends: 1395 [2021-07-13 19:44:57,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:44:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-13 19:44:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 872. [2021-07-13 19:44:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.407577497129736) internal successors, (2968), 871 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2968 transitions. [2021-07-13 19:44:57,901 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2968 transitions. Word has length 20 [2021-07-13 19:44:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:57,902 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2968 transitions. [2021-07-13 19:44:57,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:57,902 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2968 transitions. [2021-07-13 19:44:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:57,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:57,903 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:58,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3382 [2021-07-13 19:44:58,103 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:58,104 INFO L82 PathProgramCache]: Analyzing trace with hash -644245470, now seen corresponding path program 219 times [2021-07-13 19:44:58,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:58,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650709211] [2021-07-13 19:44:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650709211] [2021-07-13 19:44:58,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650709211] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677105965] [2021-07-13 19:44:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:58,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:44:58,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:58,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:58,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677105965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:58,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:58,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:44:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412311906] [2021-07-13 19:44:58,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:44:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:44:58,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:44:58,383 INFO L87 Difference]: Start difference. First operand 872 states and 2968 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:44:58,968 INFO L93 Difference]: Finished difference Result 1447 states and 4500 transitions. [2021-07-13 19:44:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:44:58,968 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:44:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:44:58,970 INFO L225 Difference]: With dead ends: 1447 [2021-07-13 19:44:58,970 INFO L226 Difference]: Without dead ends: 1447 [2021-07-13 19:44:58,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:44:58,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1447 states. [2021-07-13 19:44:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1447 to 878. [2021-07-13 19:44:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.4059293044469783) internal successors, (2987), 877 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2987 transitions. [2021-07-13 19:44:58,983 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2987 transitions. Word has length 20 [2021-07-13 19:44:58,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:44:58,983 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2987 transitions. [2021-07-13 19:44:58,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:44:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2987 transitions. [2021-07-13 19:44:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:44:58,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:44:58,984 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:44:59,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-07-13 19:44:59,184 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:44:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:44:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1430299490, now seen corresponding path program 220 times [2021-07-13 19:44:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:44:59,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324637274] [2021-07-13 19:44:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:44:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:44:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:44:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324637274] [2021-07-13 19:44:59,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324637274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89189450] [2021-07-13 19:44:59,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:44:59,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:44:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:44:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:44:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:44:59,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:44:59,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89189450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:44:59,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:44:59,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:44:59,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295955324] [2021-07-13 19:44:59,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:44:59,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:44:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:44:59,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:44:59,521 INFO L87 Difference]: Start difference. First operand 878 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:00,232 INFO L93 Difference]: Finished difference Result 1298 states and 4097 transitions. [2021-07-13 19:45:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:00,235 INFO L225 Difference]: With dead ends: 1298 [2021-07-13 19:45:00,235 INFO L226 Difference]: Without dead ends: 1291 [2021-07-13 19:45:00,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 744.2ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2021-07-13 19:45:00,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 891. [2021-07-13 19:45:00,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.401123595505618) internal successors, (3027), 890 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3027 transitions. [2021-07-13 19:45:00,250 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3027 transitions. Word has length 20 [2021-07-13 19:45:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:00,250 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3027 transitions. [2021-07-13 19:45:00,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3027 transitions. [2021-07-13 19:45:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:00,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:00,251 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:00,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-07-13 19:45:00,452 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash 64112748, now seen corresponding path program 221 times [2021-07-13 19:45:00,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:00,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785645008] [2021-07-13 19:45:00,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:00,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785645008] [2021-07-13 19:45:00,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785645008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847085372] [2021-07-13 19:45:00,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:00,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847085372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:00,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:00,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:00,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648743977] [2021-07-13 19:45:00,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:00,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:00,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:00,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:00,745 INFO L87 Difference]: Start difference. First operand 891 states and 3027 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:01,773 INFO L93 Difference]: Finished difference Result 1575 states and 4819 transitions. [2021-07-13 19:45:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:45:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:01,776 INFO L225 Difference]: With dead ends: 1575 [2021-07-13 19:45:01,776 INFO L226 Difference]: Without dead ends: 1575 [2021-07-13 19:45:01,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 937.1ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:45:01,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-07-13 19:45:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 894. [2021-07-13 19:45:01,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4053751399776035) internal successors, (3041), 893 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3041 transitions. [2021-07-13 19:45:01,790 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3041 transitions. Word has length 20 [2021-07-13 19:45:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:01,790 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3041 transitions. [2021-07-13 19:45:01,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3041 transitions. [2021-07-13 19:45:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:01,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:01,791 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:01,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:01,991 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:01,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:01,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1429794974, now seen corresponding path program 222 times [2021-07-13 19:45:01,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:01,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170213688] [2021-07-13 19:45:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:02,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170213688] [2021-07-13 19:45:02,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170213688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579692651] [2021-07-13 19:45:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:02,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:45:02,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:02,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:02,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579692651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865816515] [2021-07-13 19:45:02,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:02,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:02,286 INFO L87 Difference]: Start difference. First operand 894 states and 3041 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:02,858 INFO L93 Difference]: Finished difference Result 1469 states and 4544 transitions. [2021-07-13 19:45:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:02,870 INFO L225 Difference]: With dead ends: 1469 [2021-07-13 19:45:02,870 INFO L226 Difference]: Without dead ends: 1463 [2021-07-13 19:45:02,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 537.3ms TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:02,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1463 states. [2021-07-13 19:45:02,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1463 to 900. [2021-07-13 19:45:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.3937708565072304) internal successors, (3051), 899 states have internal predecessors, (3051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3051 transitions. [2021-07-13 19:45:02,909 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3051 transitions. Word has length 20 [2021-07-13 19:45:02,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:02,909 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3051 transitions. [2021-07-13 19:45:02,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:02,909 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3051 transitions. [2021-07-13 19:45:02,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:02,910 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:02,911 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:03,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-07-13 19:45:03,111 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1424229488, now seen corresponding path program 223 times [2021-07-13 19:45:03,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:03,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146983131] [2021-07-13 19:45:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146983131] [2021-07-13 19:45:03,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146983131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912204979] [2021-07-13 19:45:03,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:03,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:03,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912204979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:03,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:03,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:03,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823516244] [2021-07-13 19:45:03,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:03,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:03,699 INFO L87 Difference]: Start difference. First operand 900 states and 3051 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:03,970 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-07-13 19:45:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:04,360 INFO L93 Difference]: Finished difference Result 1270 states and 4047 transitions. [2021-07-13 19:45:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:04,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:04,363 INFO L225 Difference]: With dead ends: 1270 [2021-07-13 19:45:04,363 INFO L226 Difference]: Without dead ends: 1270 [2021-07-13 19:45:04,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 882.9ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:04,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2021-07-13 19:45:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 879. [2021-07-13 19:45:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 3.408883826879271) internal successors, (2993), 878 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2993 transitions. [2021-07-13 19:45:04,383 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2993 transitions. Word has length 20 [2021-07-13 19:45:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:04,383 INFO L482 AbstractCegarLoop]: Abstraction has 879 states and 2993 transitions. [2021-07-13 19:45:04,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2993 transitions. [2021-07-13 19:45:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:04,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:04,385 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:04,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3416 [2021-07-13 19:45:04,601 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:04,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1979263942, now seen corresponding path program 224 times [2021-07-13 19:45:04,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:04,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092444843] [2021-07-13 19:45:04,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:04,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092444843] [2021-07-13 19:45:04,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092444843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318323157] [2021-07-13 19:45:04,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:04,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:04,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:04,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318323157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:04,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:04,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852436362] [2021-07-13 19:45:04,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:04,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:04,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:04,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:04,884 INFO L87 Difference]: Start difference. First operand 879 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:05,474 INFO L93 Difference]: Finished difference Result 1202 states and 3860 transitions. [2021-07-13 19:45:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:45:05,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:05,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:05,478 INFO L225 Difference]: With dead ends: 1202 [2021-07-13 19:45:05,478 INFO L226 Difference]: Without dead ends: 1177 [2021-07-13 19:45:05,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:45:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-07-13 19:45:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 883. [2021-07-13 19:45:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.4047619047619047) internal successors, (3003), 882 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 3003 transitions. [2021-07-13 19:45:05,499 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 3003 transitions. Word has length 20 [2021-07-13 19:45:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:05,499 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 3003 transitions. [2021-07-13 19:45:05,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 3003 transitions. [2021-07-13 19:45:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:05,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:05,501 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:05,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-07-13 19:45:05,717 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:05,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1661141342, now seen corresponding path program 225 times [2021-07-13 19:45:05,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:05,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625368198] [2021-07-13 19:45:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:05,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625368198] [2021-07-13 19:45:05,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625368198] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667314452] [2021-07-13 19:45:05,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:05,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:05,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:05,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:05,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667314452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:05,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:05,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:45:05,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105360195] [2021-07-13 19:45:05,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:45:05,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:45:05,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:45:05,969 INFO L87 Difference]: Start difference. First operand 883 states and 3003 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:06,395 INFO L93 Difference]: Finished difference Result 1332 states and 4235 transitions. [2021-07-13 19:45:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:06,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:06,399 INFO L225 Difference]: With dead ends: 1332 [2021-07-13 19:45:06,399 INFO L226 Difference]: Without dead ends: 1332 [2021-07-13 19:45:06,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:45:06,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-07-13 19:45:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 870. [2021-07-13 19:45:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4073647871116224) internal successors, (2961), 869 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2961 transitions. [2021-07-13 19:45:06,419 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2961 transitions. Word has length 20 [2021-07-13 19:45:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:06,419 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2961 transitions. [2021-07-13 19:45:06,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2961 transitions. [2021-07-13 19:45:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:06,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:06,420 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:06,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3434,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,637 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1718811554, now seen corresponding path program 226 times [2021-07-13 19:45:06,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:06,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564896647] [2021-07-13 19:45:06,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564896647] [2021-07-13 19:45:06,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564896647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370307821] [2021-07-13 19:45:06,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:06,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:06,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:06,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:06,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370307821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:06,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:06,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:06,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717122893] [2021-07-13 19:45:06,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:06,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:06,999 INFO L87 Difference]: Start difference. First operand 870 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:07,435 INFO L93 Difference]: Finished difference Result 1256 states and 4050 transitions. [2021-07-13 19:45:07,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:07,435 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:07,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:07,438 INFO L225 Difference]: With dead ends: 1256 [2021-07-13 19:45:07,438 INFO L226 Difference]: Without dead ends: 1256 [2021-07-13 19:45:07,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 448.5ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-07-13 19:45:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 873. [2021-07-13 19:45:07,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-07-13 19:45:07,455 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-07-13 19:45:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:07,455 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-07-13 19:45:07,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-07-13 19:45:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:07,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:07,456 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:07,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3438,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,679 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:07,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:07,679 INFO L82 PathProgramCache]: Analyzing trace with hash 951965406, now seen corresponding path program 227 times [2021-07-13 19:45:07,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:07,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102222666] [2021-07-13 19:45:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:07,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102222666] [2021-07-13 19:45:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102222666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577010557] [2021-07-13 19:45:07,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:07,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:07,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:07,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:07,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:07,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577010557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:07,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:07,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:07,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324603721] [2021-07-13 19:45:07,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:07,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:07,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:07,969 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:08,427 INFO L93 Difference]: Finished difference Result 1288 states and 4131 transitions. [2021-07-13 19:45:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:08,430 INFO L225 Difference]: With dead ends: 1288 [2021-07-13 19:45:08,430 INFO L226 Difference]: Without dead ends: 1288 [2021-07-13 19:45:08,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 427.3ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-13 19:45:08,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 874. [2021-07-13 19:45:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-07-13 19:45:08,444 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-07-13 19:45:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:08,444 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-07-13 19:45:08,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-07-13 19:45:08,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:08,446 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:08,446 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:08,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3443,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,657 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1005171550, now seen corresponding path program 228 times [2021-07-13 19:45:08,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:08,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874136086] [2021-07-13 19:45:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:08,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874136086] [2021-07-13 19:45:08,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874136086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695831811] [2021-07-13 19:45:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:08,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:08,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:08,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:08,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695831811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:08,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:08,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:08,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892195161] [2021-07-13 19:45:08,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:08,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:08,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:08,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:08,972 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:09,423 INFO L93 Difference]: Finished difference Result 1255 states and 4054 transitions. [2021-07-13 19:45:09,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:09,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:09,426 INFO L225 Difference]: With dead ends: 1255 [2021-07-13 19:45:09,427 INFO L226 Difference]: Without dead ends: 1255 [2021-07-13 19:45:09,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-13 19:45:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 873. [2021-07-13 19:45:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-07-13 19:45:09,441 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-07-13 19:45:09,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:09,441 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-07-13 19:45:09,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:09,441 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-07-13 19:45:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:09,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:09,443 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:09,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3450 [2021-07-13 19:45:09,666 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:09,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:09,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1815112108, now seen corresponding path program 229 times [2021-07-13 19:45:09,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:09,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253665600] [2021-07-13 19:45:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:09,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253665600] [2021-07-13 19:45:09,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253665600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941444351] [2021-07-13 19:45:09,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:09,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941444351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:09,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:09,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:09,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28246321] [2021-07-13 19:45:09,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:09,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:09,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:09,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:09,946 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:10,506 INFO L93 Difference]: Finished difference Result 1327 states and 4214 transitions. [2021-07-13 19:45:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:10,509 INFO L225 Difference]: With dead ends: 1327 [2021-07-13 19:45:10,509 INFO L226 Difference]: Without dead ends: 1327 [2021-07-13 19:45:10,509 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-07-13 19:45:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 880. [2021-07-13 19:45:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-07-13 19:45:10,521 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-07-13 19:45:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:10,521 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-07-13 19:45:10,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-07-13 19:45:10,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:10,522 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:10,522 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:10,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3457,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,723 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1693801168, now seen corresponding path program 230 times [2021-07-13 19:45:10,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:10,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554545929] [2021-07-13 19:45:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:10,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:10,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554545929] [2021-07-13 19:45:10,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554545929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:10,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296983155] [2021-07-13 19:45:10,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:10,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:11,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296983155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:11,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:11,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:11,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439864930] [2021-07-13 19:45:11,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:11,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:11,054 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:12,043 INFO L93 Difference]: Finished difference Result 1319 states and 4148 transitions. [2021-07-13 19:45:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:12,047 INFO L225 Difference]: With dead ends: 1319 [2021-07-13 19:45:12,047 INFO L226 Difference]: Without dead ends: 1312 [2021-07-13 19:45:12,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 995.6ms TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-07-13 19:45:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 893. [2021-07-13 19:45:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-07-13 19:45:12,066 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-07-13 19:45:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:12,066 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-07-13 19:45:12,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:12,066 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-07-13 19:45:12,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:12,068 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:12,068 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:12,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-07-13 19:45:12,281 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:12,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:12,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1106753890, now seen corresponding path program 231 times [2021-07-13 19:45:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:12,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871748438] [2021-07-13 19:45:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871748438] [2021-07-13 19:45:12,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871748438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867198327] [2021-07-13 19:45:12,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:12,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:12,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867198327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:12,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:12,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:12,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876040332] [2021-07-13 19:45:12,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:12,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:12,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:12,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:12,592 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:13,612 INFO L93 Difference]: Finished difference Result 1513 states and 4641 transitions. [2021-07-13 19:45:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:45:13,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:13,620 INFO L225 Difference]: With dead ends: 1513 [2021-07-13 19:45:13,620 INFO L226 Difference]: Without dead ends: 1513 [2021-07-13 19:45:13,620 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 969.2ms TimeCoverageRelationStatistics Valid=267, Invalid=855, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:45:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-07-13 19:45:13,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 896. [2021-07-13 19:45:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4134078212290504) internal successors, (3055), 895 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3055 transitions. [2021-07-13 19:45:13,640 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3055 transitions. Word has length 20 [2021-07-13 19:45:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:13,640 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3055 transitions. [2021-07-13 19:45:13,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3055 transitions. [2021-07-13 19:45:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:13,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:13,642 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:13,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3473 [2021-07-13 19:45:13,843 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:13,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1694305684, now seen corresponding path program 232 times [2021-07-13 19:45:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:13,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89754883] [2021-07-13 19:45:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:13,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:13,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89754883] [2021-07-13 19:45:13,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89754883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:13,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107884708] [2021-07-13 19:45:13,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:13,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:13,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:13,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107884708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:14,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:14,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651009064] [2021-07-13 19:45:14,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:14,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:14,129 INFO L87 Difference]: Start difference. First operand 896 states and 3055 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:14,673 INFO L93 Difference]: Finished difference Result 1391 states and 4357 transitions. [2021-07-13 19:45:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:14,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:14,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:14,679 INFO L225 Difference]: With dead ends: 1391 [2021-07-13 19:45:14,679 INFO L226 Difference]: Without dead ends: 1385 [2021-07-13 19:45:14,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2021-07-13 19:45:14,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 902. [2021-07-13 19:45:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4017758046614874) internal successors, (3065), 901 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3065 transitions. [2021-07-13 19:45:14,698 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3065 transitions. Word has length 20 [2021-07-13 19:45:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:14,698 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3065 transitions. [2021-07-13 19:45:14,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3065 transitions. [2021-07-13 19:45:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:14,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:14,700 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:14,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3479,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:14,922 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:14,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash 253362850, now seen corresponding path program 233 times [2021-07-13 19:45:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:14,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380178807] [2021-07-13 19:45:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:14,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:14,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380178807] [2021-07-13 19:45:14,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380178807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:14,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082395752] [2021-07-13 19:45:14,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:15,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:15,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082395752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:15,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:15,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451047935] [2021-07-13 19:45:15,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:15,254 INFO L87 Difference]: Start difference. First operand 902 states and 3065 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:15,912 INFO L93 Difference]: Finished difference Result 1244 states and 3987 transitions. [2021-07-13 19:45:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:15,915 INFO L225 Difference]: With dead ends: 1244 [2021-07-13 19:45:15,915 INFO L226 Difference]: Without dead ends: 1244 [2021-07-13 19:45:15,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 692.9ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-07-13 19:45:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 886. [2021-07-13 19:45:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-07-13 19:45:15,927 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-07-13 19:45:15,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:15,927 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-07-13 19:45:15,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:15,927 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-07-13 19:45:15,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:15,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:15,928 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3485 [2021-07-13 19:45:16,129 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1018215370, now seen corresponding path program 234 times [2021-07-13 19:45:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770608881] [2021-07-13 19:45:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:16,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770608881] [2021-07-13 19:45:16,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770608881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804857926] [2021-07-13 19:45:16,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:16,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:16,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804857926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:16,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:16,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:16,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521356608] [2021-07-13 19:45:16,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:16,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:16,454 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:17,316 INFO L93 Difference]: Finished difference Result 1215 states and 3915 transitions. [2021-07-13 19:45:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:17,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:17,319 INFO L225 Difference]: With dead ends: 1215 [2021-07-13 19:45:17,319 INFO L226 Difference]: Without dead ends: 1201 [2021-07-13 19:45:17,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-13 19:45:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 886. [2021-07-13 19:45:17,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-07-13 19:45:17,331 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-07-13 19:45:17,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:17,331 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-07-13 19:45:17,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:17,331 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-07-13 19:45:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:17,332 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:17,332 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:17,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3497,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,533 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash 641912734, now seen corresponding path program 235 times [2021-07-13 19:45:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:17,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647471687] [2021-07-13 19:45:17,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:17,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647471687] [2021-07-13 19:45:17,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647471687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16057543] [2021-07-13 19:45:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:17,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16057543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:17,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:17,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:17,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780229154] [2021-07-13 19:45:17,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:17,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:17,923 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,415 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-07-13 19:45:18,665 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-07-13 19:45:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:18,892 INFO L93 Difference]: Finished difference Result 1168 states and 3814 transitions. [2021-07-13 19:45:18,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:18,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:18,894 INFO L225 Difference]: With dead ends: 1168 [2021-07-13 19:45:18,894 INFO L226 Difference]: Without dead ends: 1168 [2021-07-13 19:45:18,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 998.7ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-13 19:45:18,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 886. [2021-07-13 19:45:18,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4124293785310735) internal successors, (3020), 885 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3020 transitions. [2021-07-13 19:45:18,906 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3020 transitions. Word has length 20 [2021-07-13 19:45:18,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:18,906 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3020 transitions. [2021-07-13 19:45:18,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:18,906 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3020 transitions. [2021-07-13 19:45:18,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:18,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:18,907 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:19,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3507 [2021-07-13 19:45:19,107 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:19,108 INFO L82 PathProgramCache]: Analyzing trace with hash 3464990, now seen corresponding path program 236 times [2021-07-13 19:45:19,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:19,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412294964] [2021-07-13 19:45:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:19,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412294964] [2021-07-13 19:45:19,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412294964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585863931] [2021-07-13 19:45:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:19,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:19,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:19,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585863931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:19,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:19,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:19,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747408814] [2021-07-13 19:45:19,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:19,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:19,446 INFO L87 Difference]: Start difference. First operand 886 states and 3020 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:19,962 INFO L93 Difference]: Finished difference Result 1230 states and 3981 transitions. [2021-07-13 19:45:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:19,965 INFO L225 Difference]: With dead ends: 1230 [2021-07-13 19:45:19,965 INFO L226 Difference]: Without dead ends: 1230 [2021-07-13 19:45:19,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-13 19:45:19,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 876. [2021-07-13 19:45:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.418285714285714) internal successors, (2991), 875 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2991 transitions. [2021-07-13 19:45:19,977 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2991 transitions. Word has length 20 [2021-07-13 19:45:19,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:19,977 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2991 transitions. [2021-07-13 19:45:19,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:19,977 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2991 transitions. [2021-07-13 19:45:19,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:19,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:19,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:20,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3517,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,178 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1186231070, now seen corresponding path program 237 times [2021-07-13 19:45:20,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:20,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897976788] [2021-07-13 19:45:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:20,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897976788] [2021-07-13 19:45:20,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897976788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112364385] [2021-07-13 19:45:20,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:20,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:20,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:20,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:20,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112364385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:20,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:20,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:20,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775489224] [2021-07-13 19:45:20,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:20,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:20,500 INFO L87 Difference]: Start difference. First operand 876 states and 2991 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:21,161 INFO L93 Difference]: Finished difference Result 1261 states and 4066 transitions. [2021-07-13 19:45:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:21,163 INFO L225 Difference]: With dead ends: 1261 [2021-07-13 19:45:21,163 INFO L226 Difference]: Without dead ends: 1261 [2021-07-13 19:45:21,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 650.5ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-07-13 19:45:21,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 877. [2021-07-13 19:45:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.421232876712329) internal successors, (2997), 876 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2997 transitions. [2021-07-13 19:45:21,175 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2997 transitions. Word has length 20 [2021-07-13 19:45:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:21,175 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2997 transitions. [2021-07-13 19:45:21,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:21,175 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2997 transitions. [2021-07-13 19:45:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:21,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:21,176 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:21,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3523 [2021-07-13 19:45:21,377 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash -770905886, now seen corresponding path program 238 times [2021-07-13 19:45:21,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:21,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248029650] [2021-07-13 19:45:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:21,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248029650] [2021-07-13 19:45:21,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248029650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600876648] [2021-07-13 19:45:21,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:21,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:21,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:21,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:21,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:21,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600876648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:21,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:21,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:21,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743601444] [2021-07-13 19:45:21,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:21,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:21,675 INFO L87 Difference]: Start difference. First operand 877 states and 2997 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:22,321 INFO L93 Difference]: Finished difference Result 1218 states and 3963 transitions. [2021-07-13 19:45:22,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:22,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:22,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:22,323 INFO L225 Difference]: With dead ends: 1218 [2021-07-13 19:45:22,323 INFO L226 Difference]: Without dead ends: 1218 [2021-07-13 19:45:22,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 591.5ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:22,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-07-13 19:45:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 873. [2021-07-13 19:45:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.4128440366972477) internal successors, (2976), 872 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2976 transitions. [2021-07-13 19:45:22,336 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2976 transitions. Word has length 20 [2021-07-13 19:45:22,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:22,336 INFO L482 AbstractCegarLoop]: Abstraction has 873 states and 2976 transitions. [2021-07-13 19:45:22,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2976 transitions. [2021-07-13 19:45:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:22,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:22,338 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:22,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3529,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,538 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1170147038, now seen corresponding path program 239 times [2021-07-13 19:45:22,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:22,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483202228] [2021-07-13 19:45:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:22,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483202228] [2021-07-13 19:45:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483202228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873403501] [2021-07-13 19:45:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:22,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:22,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:22,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873403501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:22,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:22,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456403137] [2021-07-13 19:45:22,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:22,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:22,910 INFO L87 Difference]: Start difference. First operand 873 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:23,984 INFO L93 Difference]: Finished difference Result 1333 states and 4195 transitions. [2021-07-13 19:45:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:45:23,984 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:23,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:23,986 INFO L225 Difference]: With dead ends: 1333 [2021-07-13 19:45:23,987 INFO L226 Difference]: Without dead ends: 1326 [2021-07-13 19:45:23,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1079.0ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-13 19:45:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 888. [2021-07-13 19:45:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.4137542277339348) internal successors, (3028), 887 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3028 transitions. [2021-07-13 19:45:24,000 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3028 transitions. Word has length 20 [2021-07-13 19:45:24,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:24,001 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3028 transitions. [2021-07-13 19:45:24,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:24,001 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3028 transitions. [2021-07-13 19:45:24,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:24,002 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:24,002 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:24,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-07-13 19:45:24,202 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:24,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:24,203 INFO L82 PathProgramCache]: Analyzing trace with hash 324265200, now seen corresponding path program 240 times [2021-07-13 19:45:24,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:24,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732462793] [2021-07-13 19:45:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:24,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732462793] [2021-07-13 19:45:24,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732462793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827930252] [2021-07-13 19:45:24,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:24,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:24,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:24,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:24,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:24,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827930252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:24,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:24,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:24,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141113099] [2021-07-13 19:45:24,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:24,500 INFO L87 Difference]: Start difference. First operand 888 states and 3028 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:25,465 INFO L93 Difference]: Finished difference Result 1481 states and 4564 transitions. [2021-07-13 19:45:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:45:25,465 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:25,467 INFO L225 Difference]: With dead ends: 1481 [2021-07-13 19:45:25,467 INFO L226 Difference]: Without dead ends: 1481 [2021-07-13 19:45:25,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 909.5ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:45:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-07-13 19:45:25,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 892. [2021-07-13 19:45:25,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-07-13 19:45:25,481 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-07-13 19:45:25,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:25,481 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-07-13 19:45:25,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:25,481 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-07-13 19:45:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:25,482 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:25,482 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:25,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3544 [2021-07-13 19:45:25,683 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1169642522, now seen corresponding path program 241 times [2021-07-13 19:45:25,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:25,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353776182] [2021-07-13 19:45:25,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:25,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353776182] [2021-07-13 19:45:25,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353776182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375680145] [2021-07-13 19:45:25,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:25,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:25,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:25,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375680145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:25,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:25,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:25,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12487164] [2021-07-13 19:45:25,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:25,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:25,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:25,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:25,966 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:26,569 INFO L93 Difference]: Finished difference Result 1429 states and 4457 transitions. [2021-07-13 19:45:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:26,569 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:26,571 INFO L225 Difference]: With dead ends: 1429 [2021-07-13 19:45:26,571 INFO L226 Difference]: Without dead ends: 1423 [2021-07-13 19:45:26,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2021-07-13 19:45:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 898. [2021-07-13 19:45:26,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4091415830546263) internal successors, (3058), 897 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3058 transitions. [2021-07-13 19:45:26,586 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3058 transitions. Word has length 20 [2021-07-13 19:45:26,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:26,586 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3058 transitions. [2021-07-13 19:45:26,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:26,586 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3058 transitions. [2021-07-13 19:45:26,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:26,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:26,587 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:26,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,788 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:26,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:26,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1684381940, now seen corresponding path program 242 times [2021-07-13 19:45:26,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:26,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068934313] [2021-07-13 19:45:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:26,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:26,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068934313] [2021-07-13 19:45:26,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068934313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:26,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887311535] [2021-07-13 19:45:26,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:26,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:26,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:26,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:27,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887311535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:27,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:27,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:27,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939267982] [2021-07-13 19:45:27,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:27,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:27,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:27,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:27,127 INFO L87 Difference]: Start difference. First operand 898 states and 3058 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:28,062 INFO L93 Difference]: Finished difference Result 1305 states and 4149 transitions. [2021-07-13 19:45:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:28,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:28,064 INFO L225 Difference]: With dead ends: 1305 [2021-07-13 19:45:28,064 INFO L226 Difference]: Without dead ends: 1305 [2021-07-13 19:45:28,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 933.4ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2021-07-13 19:45:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 895. [2021-07-13 19:45:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.411633109619687) internal successors, (3050), 894 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3050 transitions. [2021-07-13 19:45:28,086 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3050 transitions. Word has length 20 [2021-07-13 19:45:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:28,086 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3050 transitions. [2021-07-13 19:45:28,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3050 transitions. [2021-07-13 19:45:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:28,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:28,087 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:28,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-07-13 19:45:28,288 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:28,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1939683514, now seen corresponding path program 243 times [2021-07-13 19:45:28,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:28,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115743884] [2021-07-13 19:45:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115743884] [2021-07-13 19:45:28,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115743884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920448365] [2021-07-13 19:45:28,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:28,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:28,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:28,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:28,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:28,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920448365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:28,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:28,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220095086] [2021-07-13 19:45:28,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:28,646 INFO L87 Difference]: Start difference. First operand 895 states and 3050 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:29,710 INFO L93 Difference]: Finished difference Result 1292 states and 4096 transitions. [2021-07-13 19:45:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:29,712 INFO L225 Difference]: With dead ends: 1292 [2021-07-13 19:45:29,712 INFO L226 Difference]: Without dead ends: 1285 [2021-07-13 19:45:29,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1059.6ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-07-13 19:45:29,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 899. [2021-07-13 19:45:29,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.4120267260579062) internal successors, (3064), 898 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 3064 transitions. [2021-07-13 19:45:29,726 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 3064 transitions. Word has length 20 [2021-07-13 19:45:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:29,726 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 3064 transitions. [2021-07-13 19:45:29,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 3064 transitions. [2021-07-13 19:45:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:29,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:29,727 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:29,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3569,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:29,928 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:29,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:29,928 INFO L82 PathProgramCache]: Analyzing trace with hash 12619042, now seen corresponding path program 244 times [2021-07-13 19:45:29,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:29,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286259225] [2021-07-13 19:45:29,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:30,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286259225] [2021-07-13 19:45:30,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286259225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631419252] [2021-07-13 19:45:30,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:30,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631419252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:30,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086735221] [2021-07-13 19:45:30,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:30,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:30,311 INFO L87 Difference]: Start difference. First operand 899 states and 3064 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:31,354 INFO L93 Difference]: Finished difference Result 1226 states and 3964 transitions. [2021-07-13 19:45:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:31,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:31,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:31,357 INFO L225 Difference]: With dead ends: 1226 [2021-07-13 19:45:31,357 INFO L226 Difference]: Without dead ends: 1226 [2021-07-13 19:45:31,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1069.3ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:31,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-07-13 19:45:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 897. [2021-07-13 19:45:31,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4140625) internal successors, (3059), 896 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3059 transitions. [2021-07-13 19:45:31,376 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3059 transitions. Word has length 20 [2021-07-13 19:45:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:31,376 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3059 transitions. [2021-07-13 19:45:31,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:31,377 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3059 transitions. [2021-07-13 19:45:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:31,378 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:31,378 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:31,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3579,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,578 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1075665638, now seen corresponding path program 245 times [2021-07-13 19:45:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:31,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364320351] [2021-07-13 19:45:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:31,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364320351] [2021-07-13 19:45:31,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364320351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679174034] [2021-07-13 19:45:31,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:31,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:31,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:31,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:31,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679174034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:31,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:31,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:31,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503074703] [2021-07-13 19:45:31,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:31,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:31,870 INFO L87 Difference]: Start difference. First operand 897 states and 3059 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:32,663 INFO L93 Difference]: Finished difference Result 1318 states and 4204 transitions. [2021-07-13 19:45:32,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:32,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:32,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:32,665 INFO L225 Difference]: With dead ends: 1318 [2021-07-13 19:45:32,665 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 19:45:32,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:32,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 19:45:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 888. [2021-07-13 19:45:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.41826381059752) internal successors, (3032), 887 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3032 transitions. [2021-07-13 19:45:32,677 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3032 transitions. Word has length 20 [2021-07-13 19:45:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:32,677 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3032 transitions. [2021-07-13 19:45:32,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3032 transitions. [2021-07-13 19:45:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:32,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:32,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:32,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3592,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:32,879 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:32,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1926959258, now seen corresponding path program 246 times [2021-07-13 19:45:32,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:32,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521100277] [2021-07-13 19:45:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:32,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521100277] [2021-07-13 19:45:32,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521100277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:32,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737103837] [2021-07-13 19:45:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:33,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:33,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737103837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:33,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:33,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:33,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465512759] [2021-07-13 19:45:33,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:33,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:33,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:33,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:33,174 INFO L87 Difference]: Start difference. First operand 888 states and 3032 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:33,975 INFO L93 Difference]: Finished difference Result 1287 states and 4137 transitions. [2021-07-13 19:45:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:33,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:33,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:33,977 INFO L225 Difference]: With dead ends: 1287 [2021-07-13 19:45:33,977 INFO L226 Difference]: Without dead ends: 1287 [2021-07-13 19:45:33,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-13 19:45:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 887. [2021-07-13 19:45:33,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-07-13 19:45:33,989 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-07-13 19:45:33,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:33,989 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-07-13 19:45:33,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-07-13 19:45:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:33,991 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:33,991 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:34,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,191 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:34,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:34,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1096402166, now seen corresponding path program 247 times [2021-07-13 19:45:34,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:34,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417402111] [2021-07-13 19:45:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:34,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:34,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417402111] [2021-07-13 19:45:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417402111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210241001] [2021-07-13 19:45:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:34,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210241001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:34,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:34,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:34,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375246888] [2021-07-13 19:45:34,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:34,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:34,473 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:35,084 INFO L93 Difference]: Finished difference Result 1319 states and 4182 transitions. [2021-07-13 19:45:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:35,086 INFO L225 Difference]: With dead ends: 1319 [2021-07-13 19:45:35,086 INFO L226 Difference]: Without dead ends: 1313 [2021-07-13 19:45:35,086 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 565.7ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:35,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-13 19:45:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 897. [2021-07-13 19:45:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4073660714285716) internal successors, (3053), 896 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3053 transitions. [2021-07-13 19:45:35,099 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3053 transitions. Word has length 20 [2021-07-13 19:45:35,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:35,099 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3053 transitions. [2021-07-13 19:45:35,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:35,099 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3053 transitions. [2021-07-13 19:45:35,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:35,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:35,100 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:35,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-07-13 19:45:35,301 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:35,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:35,304 INFO L82 PathProgramCache]: Analyzing trace with hash -819021760, now seen corresponding path program 248 times [2021-07-13 19:45:35,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:35,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810189343] [2021-07-13 19:45:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810189343] [2021-07-13 19:45:35,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810189343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912783804] [2021-07-13 19:45:35,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:35,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:35,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:35,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:35,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912783804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:35,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:35,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:35,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336494061] [2021-07-13 19:45:35,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:35,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:35,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:35,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:35,599 INFO L87 Difference]: Start difference. First operand 897 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:36,383 INFO L93 Difference]: Finished difference Result 1230 states and 3985 transitions. [2021-07-13 19:45:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:36,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:36,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:36,385 INFO L225 Difference]: With dead ends: 1230 [2021-07-13 19:45:36,385 INFO L226 Difference]: Without dead ends: 1230 [2021-07-13 19:45:36,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 756.2ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:36,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-07-13 19:45:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 887. [2021-07-13 19:45:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 3.415349887133183) internal successors, (3026), 886 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 3026 transitions. [2021-07-13 19:45:36,397 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 3026 transitions. Word has length 20 [2021-07-13 19:45:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:36,397 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 3026 transitions. [2021-07-13 19:45:36,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 3026 transitions. [2021-07-13 19:45:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:36,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:36,398 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:36,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3616 [2021-07-13 19:45:36,599 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:36,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1591996514, now seen corresponding path program 249 times [2021-07-13 19:45:36,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:36,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906624228] [2021-07-13 19:45:36,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:36,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906624228] [2021-07-13 19:45:36,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906624228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72822805] [2021-07-13 19:45:36,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:36,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:45:36,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:36,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:36,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:36,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72822805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:36,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:36,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:36,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243705968] [2021-07-13 19:45:36,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:36,981 INFO L87 Difference]: Start difference. First operand 887 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:37,665 INFO L93 Difference]: Finished difference Result 1205 states and 3896 transitions. [2021-07-13 19:45:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:37,667 INFO L225 Difference]: With dead ends: 1205 [2021-07-13 19:45:37,667 INFO L226 Difference]: Without dead ends: 1205 [2021-07-13 19:45:37,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-13 19:45:37,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 886. [2021-07-13 19:45:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4135593220338984) internal successors, (3021), 885 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3021 transitions. [2021-07-13 19:45:37,679 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3021 transitions. Word has length 20 [2021-07-13 19:45:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:37,679 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3021 transitions. [2021-07-13 19:45:37,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3021 transitions. [2021-07-13 19:45:37,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:37,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:37,680 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:37,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3624 [2021-07-13 19:45:37,880 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:37,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1078633014, now seen corresponding path program 250 times [2021-07-13 19:45:37,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:37,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679579780] [2021-07-13 19:45:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:37,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679579780] [2021-07-13 19:45:37,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679579780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242654369] [2021-07-13 19:45:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:38,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:38,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:38,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:38,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:38,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242654369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:38,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:38,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:38,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802099186] [2021-07-13 19:45:38,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:38,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:38,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:38,216 INFO L87 Difference]: Start difference. First operand 886 states and 3021 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:39,017 INFO L93 Difference]: Finished difference Result 1169 states and 3816 transitions. [2021-07-13 19:45:39,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:45:39,017 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:39,019 INFO L225 Difference]: With dead ends: 1169 [2021-07-13 19:45:39,019 INFO L226 Difference]: Without dead ends: 1169 [2021-07-13 19:45:39,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 760.3ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-07-13 19:45:39,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 874. [2021-07-13 19:45:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-07-13 19:45:39,031 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-07-13 19:45:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:39,031 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-07-13 19:45:39,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-07-13 19:45:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:39,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:39,032 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:39,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3632,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,233 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1669793570, now seen corresponding path program 251 times [2021-07-13 19:45:39,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:39,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221287697] [2021-07-13 19:45:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:39,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221287697] [2021-07-13 19:45:39,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221287697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481284807] [2021-07-13 19:45:39,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:39,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:39,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:39,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:39,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481284807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:39,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:39,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:39,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918762471] [2021-07-13 19:45:39,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:39,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:39,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:39,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:39,502 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:39,926 INFO L93 Difference]: Finished difference Result 1140 states and 3669 transitions. [2021-07-13 19:45:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:39,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:39,928 INFO L225 Difference]: With dead ends: 1140 [2021-07-13 19:45:39,928 INFO L226 Difference]: Without dead ends: 1140 [2021-07-13 19:45:39,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-13 19:45:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 877. [2021-07-13 19:45:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 3.41324200913242) internal successors, (2990), 876 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2990 transitions. [2021-07-13 19:45:39,939 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2990 transitions. Word has length 20 [2021-07-13 19:45:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:39,939 INFO L482 AbstractCegarLoop]: Abstraction has 877 states and 2990 transitions. [2021-07-13 19:45:39,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2990 transitions. [2021-07-13 19:45:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:39,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:39,940 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:40,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3642,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,141 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1916815508, now seen corresponding path program 252 times [2021-07-13 19:45:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973881810] [2021-07-13 19:45:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:40,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973881810] [2021-07-13 19:45:40,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973881810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249259031] [2021-07-13 19:45:40,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:40,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:40,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:40,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:40,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249259031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:40,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:40,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:40,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933767215] [2021-07-13 19:45:40,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:40,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:40,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:40,426 INFO L87 Difference]: Start difference. First operand 877 states and 2990 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:41,168 INFO L93 Difference]: Finished difference Result 1255 states and 3956 transitions. [2021-07-13 19:45:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:45:41,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:41,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:41,170 INFO L225 Difference]: With dead ends: 1255 [2021-07-13 19:45:41,170 INFO L226 Difference]: Without dead ends: 1255 [2021-07-13 19:45:41,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 690.9ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:45:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-07-13 19:45:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 880. [2021-07-13 19:45:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.4141069397042094) internal successors, (3001), 879 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 3001 transitions. [2021-07-13 19:45:41,182 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 3001 transitions. Word has length 20 [2021-07-13 19:45:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:41,182 INFO L482 AbstractCegarLoop]: Abstraction has 880 states and 3001 transitions. [2021-07-13 19:45:41,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 3001 transitions. [2021-07-13 19:45:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:41,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:41,183 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:41,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3644,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,384 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 884244066, now seen corresponding path program 253 times [2021-07-13 19:45:41,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:41,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261949963] [2021-07-13 19:45:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:41,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:41,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261949963] [2021-07-13 19:45:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261949963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732714994] [2021-07-13 19:45:41,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:41,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:41,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:41,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732714994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:41,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:41,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:41,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357523479] [2021-07-13 19:45:41,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:41,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:41,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:41,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:41,667 INFO L87 Difference]: Start difference. First operand 880 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:42,118 INFO L93 Difference]: Finished difference Result 1189 states and 3781 transitions. [2021-07-13 19:45:42,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:42,120 INFO L225 Difference]: With dead ends: 1189 [2021-07-13 19:45:42,120 INFO L226 Difference]: Without dead ends: 1183 [2021-07-13 19:45:42,120 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-13 19:45:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 874. [2021-07-13 19:45:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.415807560137457) internal successors, (2982), 873 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2982 transitions. [2021-07-13 19:45:42,131 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2982 transitions. Word has length 20 [2021-07-13 19:45:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:42,131 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2982 transitions. [2021-07-13 19:45:42,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2982 transitions. [2021-07-13 19:45:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:42,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:42,133 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:42,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3649,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,333 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1223044570, now seen corresponding path program 254 times [2021-07-13 19:45:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:42,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30406502] [2021-07-13 19:45:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30406502] [2021-07-13 19:45:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30406502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000451918] [2021-07-13 19:45:42,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:42,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:42,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:42,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000451918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:42,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:42,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:42,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315214028] [2021-07-13 19:45:42,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:42,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:42,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:42,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:42,604 INFO L87 Difference]: Start difference. First operand 874 states and 2982 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:43,010 INFO L93 Difference]: Finished difference Result 1182 states and 3754 transitions. [2021-07-13 19:45:43,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:43,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:43,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:43,012 INFO L225 Difference]: With dead ends: 1182 [2021-07-13 19:45:43,012 INFO L226 Difference]: Without dead ends: 1175 [2021-07-13 19:45:43,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:43,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-13 19:45:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 893. [2021-07-13 19:45:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4091928251121075) internal successors, (3041), 892 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3041 transitions. [2021-07-13 19:45:43,024 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3041 transitions. Word has length 20 [2021-07-13 19:45:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:43,024 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3041 transitions. [2021-07-13 19:45:43,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3041 transitions. [2021-07-13 19:45:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:43,026 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:43,026 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:43,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,226 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:43,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1222540054, now seen corresponding path program 255 times [2021-07-13 19:45:43,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:43,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566726235] [2021-07-13 19:45:43,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:43,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566726235] [2021-07-13 19:45:43,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566726235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696144315] [2021-07-13 19:45:43,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:43,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:43,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:43,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:43,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696144315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:43,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:43,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:43,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994806255] [2021-07-13 19:45:43,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:43,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:43,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:43,510 INFO L87 Difference]: Start difference. First operand 893 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:44,060 INFO L93 Difference]: Finished difference Result 1195 states and 3797 transitions. [2021-07-13 19:45:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:45:44,061 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:44,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:44,062 INFO L225 Difference]: With dead ends: 1195 [2021-07-13 19:45:44,063 INFO L226 Difference]: Without dead ends: 1183 [2021-07-13 19:45:44,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:45:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-07-13 19:45:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 893. [2021-07-13 19:45:44,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.405829596412556) internal successors, (3038), 892 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3038 transitions. [2021-07-13 19:45:44,074 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3038 transitions. Word has length 20 [2021-07-13 19:45:44,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:44,074 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3038 transitions. [2021-07-13 19:45:44,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:44,074 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3038 transitions. [2021-07-13 19:45:44,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:44,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:44,075 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:44,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3658,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,276 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1631484408, now seen corresponding path program 256 times [2021-07-13 19:45:44,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:44,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554938627] [2021-07-13 19:45:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554938627] [2021-07-13 19:45:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554938627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898792942] [2021-07-13 19:45:44,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:44,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:44,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:44,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898792942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:44,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:44,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:44,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032674468] [2021-07-13 19:45:44,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:44,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:44,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:44,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:44,570 INFO L87 Difference]: Start difference. First operand 893 states and 3038 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:45,040 INFO L93 Difference]: Finished difference Result 1131 states and 3640 transitions. [2021-07-13 19:45:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:45,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:45,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:45,042 INFO L225 Difference]: With dead ends: 1131 [2021-07-13 19:45:45,042 INFO L226 Difference]: Without dead ends: 1131 [2021-07-13 19:45:45,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-13 19:45:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 890. [2021-07-13 19:45:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.408323959505062) internal successors, (3030), 889 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3030 transitions. [2021-07-13 19:45:45,054 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3030 transitions. Word has length 20 [2021-07-13 19:45:45,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:45,054 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3030 transitions. [2021-07-13 19:45:45,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,054 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3030 transitions. [2021-07-13 19:45:45,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:45,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:45,055 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:45,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3663,285 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,256 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash -514686352, now seen corresponding path program 257 times [2021-07-13 19:45:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:45,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073151321] [2021-07-13 19:45:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073151321] [2021-07-13 19:45:45,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073151321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026892124] [2021-07-13 19:45:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:45,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:45,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:45,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:45,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:45,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026892124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:45,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:45,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:45,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926247938] [2021-07-13 19:45:45,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:45,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:45,528 INFO L87 Difference]: Start difference. First operand 890 states and 3030 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:45,875 INFO L93 Difference]: Finished difference Result 1057 states and 3471 transitions. [2021-07-13 19:45:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:45,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:45,877 INFO L225 Difference]: With dead ends: 1057 [2021-07-13 19:45:45,877 INFO L226 Difference]: Without dead ends: 1057 [2021-07-13 19:45:45,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:45:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-13 19:45:45,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 871. [2021-07-13 19:45:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-07-13 19:45:45,888 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-07-13 19:45:45,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:45,888 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-07-13 19:45:45,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:45,888 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-07-13 19:45:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:45,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:45,889 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:46,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3668 [2021-07-13 19:45:46,090 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:46,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2083858536, now seen corresponding path program 258 times [2021-07-13 19:45:46,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:46,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719075373] [2021-07-13 19:45:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:46,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:46,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719075373] [2021-07-13 19:45:46,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719075373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274304702] [2021-07-13 19:45:46,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:46,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:46,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:46,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:46,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:46,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274304702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:46,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:46,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:46,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580829834] [2021-07-13 19:45:46,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:46,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:46,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:46,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:46,393 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:46,890 INFO L93 Difference]: Finished difference Result 1173 states and 3762 transitions. [2021-07-13 19:45:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:46,892 INFO L225 Difference]: With dead ends: 1173 [2021-07-13 19:45:46,892 INFO L226 Difference]: Without dead ends: 1173 [2021-07-13 19:45:46,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 499.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-13 19:45:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 878. [2021-07-13 19:45:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.419612314709236) internal successors, (2999), 877 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2999 transitions. [2021-07-13 19:45:46,903 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2999 transitions. Word has length 20 [2021-07-13 19:45:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:46,903 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 2999 transitions. [2021-07-13 19:45:46,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2999 transitions. [2021-07-13 19:45:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:46,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:46,905 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:47,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-07-13 19:45:47,105 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1375500318, now seen corresponding path program 259 times [2021-07-13 19:45:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520167932] [2021-07-13 19:45:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520167932] [2021-07-13 19:45:47,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520167932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827530972] [2021-07-13 19:45:47,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:47,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:47,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827530972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:47,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:47,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569205127] [2021-07-13 19:45:47,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:47,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:47,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:47,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:47,412 INFO L87 Difference]: Start difference. First operand 878 states and 2999 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:48,370 INFO L93 Difference]: Finished difference Result 1387 states and 4260 transitions. [2021-07-13 19:45:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:45:48,370 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:48,373 INFO L225 Difference]: With dead ends: 1387 [2021-07-13 19:45:48,373 INFO L226 Difference]: Without dead ends: 1387 [2021-07-13 19:45:48,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 915.3ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:45:48,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2021-07-13 19:45:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 884. [2021-07-13 19:45:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.4246885617214042) internal successors, (3024), 883 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3024 transitions. [2021-07-13 19:45:48,387 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3024 transitions. Word has length 20 [2021-07-13 19:45:48,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:48,387 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3024 transitions. [2021-07-13 19:45:48,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:48,387 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3024 transitions. [2021-07-13 19:45:48,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:48,388 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:48,388 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:48,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3674,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,588 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1425559256, now seen corresponding path program 260 times [2021-07-13 19:45:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:48,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292051100] [2021-07-13 19:45:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292051100] [2021-07-13 19:45:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292051100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148946352] [2021-07-13 19:45:48,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:48,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:48,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148946352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:48,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:48,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65012835] [2021-07-13 19:45:48,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:48,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:48,893 INFO L87 Difference]: Start difference. First operand 884 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:49,403 INFO L93 Difference]: Finished difference Result 1250 states and 3939 transitions. [2021-07-13 19:45:49,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:45:49,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:49,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:49,405 INFO L225 Difference]: With dead ends: 1250 [2021-07-13 19:45:49,405 INFO L226 Difference]: Without dead ends: 1244 [2021-07-13 19:45:49,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 491.9ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:45:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-07-13 19:45:49,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 884. [2021-07-13 19:45:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-07-13 19:45:49,417 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-07-13 19:45:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:49,417 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-07-13 19:45:49,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-07-13 19:45:49,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:49,419 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:49,419 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:49,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3682,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,619 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:49,619 INFO L82 PathProgramCache]: Analyzing trace with hash 749468942, now seen corresponding path program 261 times [2021-07-13 19:45:49,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:49,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952346692] [2021-07-13 19:45:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:49,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952346692] [2021-07-13 19:45:49,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952346692] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23114294] [2021-07-13 19:45:49,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:49,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:49,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:49,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23114294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:49,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:49,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:49,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159213956] [2021-07-13 19:45:49,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:49,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:49,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:49,945 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,661 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 33 [2021-07-13 19:45:50,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:50,736 INFO L93 Difference]: Finished difference Result 1109 states and 3593 transitions. [2021-07-13 19:45:50,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:45:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:50,738 INFO L225 Difference]: With dead ends: 1109 [2021-07-13 19:45:50,738 INFO L226 Difference]: Without dead ends: 1095 [2021-07-13 19:45:50,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 769.6ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-07-13 19:45:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 884. [2021-07-13 19:45:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-07-13 19:45:50,749 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-07-13 19:45:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:50,749 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-07-13 19:45:50,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-07-13 19:45:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:50,751 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:50,751 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:50,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3691 [2021-07-13 19:45:50,952 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash 373166306, now seen corresponding path program 262 times [2021-07-13 19:45:50,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:50,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836788233] [2021-07-13 19:45:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:50,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836788233] [2021-07-13 19:45:51,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836788233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971160876] [2021-07-13 19:45:51,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:51,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:51,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:51,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:51,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971160876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:51,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:51,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:51,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690307419] [2021-07-13 19:45:51,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:51,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:51,320 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:51,765 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-07-13 19:45:52,019 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-07-13 19:45:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:52,112 INFO L93 Difference]: Finished difference Result 1050 states and 3462 transitions. [2021-07-13 19:45:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:45:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:52,114 INFO L225 Difference]: With dead ends: 1050 [2021-07-13 19:45:52,114 INFO L226 Difference]: Without dead ends: 1050 [2021-07-13 19:45:52,114 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 832.0ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2021-07-13 19:45:52,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 884. [2021-07-13 19:45:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.417893544733862) internal successors, (3018), 883 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3018 transitions. [2021-07-13 19:45:52,125 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3018 transitions. Word has length 20 [2021-07-13 19:45:52,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:52,125 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3018 transitions. [2021-07-13 19:45:52,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3018 transitions. [2021-07-13 19:45:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:52,126 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:52,126 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:52,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,326 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash -265281438, now seen corresponding path program 263 times [2021-07-13 19:45:52,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:52,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442845483] [2021-07-13 19:45:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442845483] [2021-07-13 19:45:52,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442845483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553587847] [2021-07-13 19:45:52,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:52,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:52,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:52,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:52,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:52,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553587847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:52,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:52,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555837146] [2021-07-13 19:45:52,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:52,609 INFO L87 Difference]: Start difference. First operand 884 states and 3018 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:53,108 INFO L93 Difference]: Finished difference Result 1088 states and 3558 transitions. [2021-07-13 19:45:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:53,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:53,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:53,110 INFO L225 Difference]: With dead ends: 1088 [2021-07-13 19:45:53,110 INFO L226 Difference]: Without dead ends: 1088 [2021-07-13 19:45:53,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-07-13 19:45:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 874. [2021-07-13 19:45:53,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4238258877434133) internal successors, (2989), 873 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2989 transitions. [2021-07-13 19:45:53,121 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2989 transitions. Word has length 20 [2021-07-13 19:45:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:53,121 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 2989 transitions. [2021-07-13 19:45:53,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2989 transitions. [2021-07-13 19:45:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:53,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:53,122 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:53,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3707 [2021-07-13 19:45:53,323 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:53,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:53,323 INFO L82 PathProgramCache]: Analyzing trace with hash 917484642, now seen corresponding path program 264 times [2021-07-13 19:45:53,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:53,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293908361] [2021-07-13 19:45:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:53,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293908361] [2021-07-13 19:45:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293908361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473579584] [2021-07-13 19:45:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:53,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:45:53,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:53,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:53,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:53,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473579584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:53,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:53,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:53,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148627071] [2021-07-13 19:45:53,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:53,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:53,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:53,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:53,606 INFO L87 Difference]: Start difference. First operand 874 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:54,150 INFO L93 Difference]: Finished difference Result 1100 states and 3587 transitions. [2021-07-13 19:45:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:54,153 INFO L225 Difference]: With dead ends: 1100 [2021-07-13 19:45:54,153 INFO L226 Difference]: Without dead ends: 1100 [2021-07-13 19:45:54,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 494.8ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:45:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-07-13 19:45:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 875. [2021-07-13 19:45:54,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.426773455377574) internal successors, (2995), 874 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2995 transitions. [2021-07-13 19:45:54,163 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2995 transitions. Word has length 20 [2021-07-13 19:45:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:54,163 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2995 transitions. [2021-07-13 19:45:54,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2995 transitions. [2021-07-13 19:45:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:54,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:54,165 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:54,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3711,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,365 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1039652314, now seen corresponding path program 265 times [2021-07-13 19:45:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:54,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670631] [2021-07-13 19:45:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670631] [2021-07-13 19:45:54,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106135891] [2021-07-13 19:45:54,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:54,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:54,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:54,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106135891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:54,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:54,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:45:54,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946779374] [2021-07-13 19:45:54,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:45:54,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:54,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:45:54,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:45:54,691 INFO L87 Difference]: Start difference. First operand 875 states and 2995 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:55,268 INFO L93 Difference]: Finished difference Result 1067 states and 3510 transitions. [2021-07-13 19:45:55,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:45:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:55,270 INFO L225 Difference]: With dead ends: 1067 [2021-07-13 19:45:55,270 INFO L226 Difference]: Without dead ends: 1067 [2021-07-13 19:45:55,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 536.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:45:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-13 19:45:55,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 871. [2021-07-13 19:45:55,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 3.418390804597701) internal successors, (2974), 870 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2974 transitions. [2021-07-13 19:45:55,281 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2974 transitions. Word has length 20 [2021-07-13 19:45:55,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:55,281 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2974 transitions. [2021-07-13 19:45:55,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:55,281 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2974 transitions. [2021-07-13 19:45:55,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:55,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:55,283 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:55,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3717 [2021-07-13 19:45:55,483 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:55,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:55,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1438893466, now seen corresponding path program 266 times [2021-07-13 19:45:55,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:55,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602459703] [2021-07-13 19:45:55,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602459703] [2021-07-13 19:45:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602459703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77222590] [2021-07-13 19:45:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:55,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:45:55,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:55,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:55,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:55,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77222590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:55,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:55,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:55,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639483016] [2021-07-13 19:45:55,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:55,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:55,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:55,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:55,811 INFO L87 Difference]: Start difference. First operand 871 states and 2974 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:56,612 INFO L93 Difference]: Finished difference Result 1241 states and 3910 transitions. [2021-07-13 19:45:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:45:56,612 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:56,614 INFO L225 Difference]: With dead ends: 1241 [2021-07-13 19:45:56,614 INFO L226 Difference]: Without dead ends: 1234 [2021-07-13 19:45:56,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 803.9ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:45:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-07-13 19:45:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 886. [2021-07-13 19:45:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-07-13 19:45:56,626 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-07-13 19:45:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:56,626 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-07-13 19:45:56,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-07-13 19:45:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:56,627 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:56,627 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:56,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3723,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,827 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:56,828 INFO L82 PathProgramCache]: Analyzing trace with hash 55518772, now seen corresponding path program 267 times [2021-07-13 19:45:56,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:56,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592212769] [2021-07-13 19:45:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:56,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:56,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592212769] [2021-07-13 19:45:56,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592212769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:56,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848467221] [2021-07-13 19:45:56,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:56,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:45:56,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:57,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848467221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:57,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:57,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:57,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247564270] [2021-07-13 19:45:57,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:57,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:57,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:57,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:57,138 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:58,036 INFO L93 Difference]: Finished difference Result 1372 states and 4241 transitions. [2021-07-13 19:45:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:45:58,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:58,038 INFO L225 Difference]: With dead ends: 1372 [2021-07-13 19:45:58,038 INFO L226 Difference]: Without dead ends: 1372 [2021-07-13 19:45:58,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:45:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-07-13 19:45:58,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 890. [2021-07-13 19:45:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-07-13 19:45:58,051 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-07-13 19:45:58,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:58,051 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-07-13 19:45:58,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:58,051 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-07-13 19:45:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:58,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:58,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:58,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3731,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,254 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:58,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:58,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1438388950, now seen corresponding path program 268 times [2021-07-13 19:45:58,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:58,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939196442] [2021-07-13 19:45:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939196442] [2021-07-13 19:45:58,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939196442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254114286] [2021-07-13 19:45:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:58,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:45:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:58,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:58,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254114286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:58,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:58,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:58,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155957514] [2021-07-13 19:45:58,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:58,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:58,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:58,539 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:45:59,121 INFO L93 Difference]: Finished difference Result 1305 states and 4097 transitions. [2021-07-13 19:45:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:45:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:45:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:45:59,123 INFO L225 Difference]: With dead ends: 1305 [2021-07-13 19:45:59,123 INFO L226 Difference]: Without dead ends: 1299 [2021-07-13 19:45:59,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:45:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2021-07-13 19:45:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 896. [2021-07-13 19:45:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.4145251396648044) internal successors, (3056), 895 states have internal predecessors, (3056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 3056 transitions. [2021-07-13 19:45:59,135 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 3056 transitions. Word has length 20 [2021-07-13 19:45:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:45:59,136 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 3056 transitions. [2021-07-13 19:45:59,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:45:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 3056 transitions. [2021-07-13 19:45:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:45:59,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:45:59,137 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:45:59,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3739 [2021-07-13 19:45:59,337 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:45:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:45:59,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1415635512, now seen corresponding path program 269 times [2021-07-13 19:45:59,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:45:59,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803274175] [2021-07-13 19:45:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:45:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:45:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:45:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803274175] [2021-07-13 19:45:59,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803274175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367167540] [2021-07-13 19:45:59,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:45:59,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:45:59,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:45:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:45:59,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:45:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:45:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367167540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:45:59,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:45:59,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:45:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051717721] [2021-07-13 19:45:59,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:45:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:45:59,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:45:59,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:45:59,643 INFO L87 Difference]: Start difference. First operand 896 states and 3056 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:00,362 INFO L93 Difference]: Finished difference Result 1219 states and 3879 transitions. [2021-07-13 19:46:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:00,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:00,364 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 19:46:00,364 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 19:46:00,364 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 681.0ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 19:46:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 893. [2021-07-13 19:46:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4170403587443947) internal successors, (3048), 892 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3048 transitions. [2021-07-13 19:46:00,376 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3048 transitions. Word has length 20 [2021-07-13 19:46:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:00,376 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3048 transitions. [2021-07-13 19:46:00,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3048 transitions. [2021-07-13 19:46:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:00,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:00,377 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:00,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3747 [2021-07-13 19:46:00,578 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:00,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:00,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1670937086, now seen corresponding path program 270 times [2021-07-13 19:46:00,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:00,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722782899] [2021-07-13 19:46:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722782899] [2021-07-13 19:46:00,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722782899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461763099] [2021-07-13 19:46:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:00,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:00,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461763099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:00,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:00,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:00,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603605652] [2021-07-13 19:46:00,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:00,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:00,964 INFO L87 Difference]: Start difference. First operand 893 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,287 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-13 19:46:01,502 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-07-13 19:46:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:01,902 INFO L93 Difference]: Finished difference Result 1200 states and 3811 transitions. [2021-07-13 19:46:01,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:01,904 INFO L225 Difference]: With dead ends: 1200 [2021-07-13 19:46:01,904 INFO L226 Difference]: Without dead ends: 1193 [2021-07-13 19:46:01,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 948.2ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:01,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-07-13 19:46:01,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 897. [2021-07-13 19:46:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.4174107142857144) internal successors, (3062), 896 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3062 transitions. [2021-07-13 19:46:01,916 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3062 transitions. Word has length 20 [2021-07-13 19:46:01,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:01,916 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3062 transitions. [2021-07-13 19:46:01,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3062 transitions. [2021-07-13 19:46:01,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:01,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:01,917 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:02,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3757,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,118 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:02,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:02,118 INFO L82 PathProgramCache]: Analyzing trace with hash -256127386, now seen corresponding path program 271 times [2021-07-13 19:46:02,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:02,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763174118] [2021-07-13 19:46:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763174118] [2021-07-13 19:46:02,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763174118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310042318] [2021-07-13 19:46:02,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:02,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:02,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:02,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310042318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:02,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:02,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:02,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004531595] [2021-07-13 19:46:02,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:02,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:02,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:02,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:02,440 INFO L87 Difference]: Start difference. First operand 897 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:03,220 INFO L93 Difference]: Finished difference Result 1122 states and 3649 transitions. [2021-07-13 19:46:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:03,222 INFO L225 Difference]: With dead ends: 1122 [2021-07-13 19:46:03,222 INFO L226 Difference]: Without dead ends: 1122 [2021-07-13 19:46:03,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 747.2ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-07-13 19:46:03,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 895. [2021-07-13 19:46:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4194630872483223) internal successors, (3057), 894 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3057 transitions. [2021-07-13 19:46:03,233 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3057 transitions. Word has length 20 [2021-07-13 19:46:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:03,234 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3057 transitions. [2021-07-13 19:46:03,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3057 transitions. [2021-07-13 19:46:03,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:03,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:03,235 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:03,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3769 [2021-07-13 19:46:03,435 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:03,435 INFO L82 PathProgramCache]: Analyzing trace with hash 806919210, now seen corresponding path program 272 times [2021-07-13 19:46:03,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:03,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326509043] [2021-07-13 19:46:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:03,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326509043] [2021-07-13 19:46:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326509043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937712196] [2021-07-13 19:46:03,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:03,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937712196] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886730071] [2021-07-13 19:46:03,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:03,725 INFO L87 Difference]: Start difference. First operand 895 states and 3057 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:04,444 INFO L93 Difference]: Finished difference Result 1196 states and 3849 transitions. [2021-07-13 19:46:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:04,446 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 19:46:04,446 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 19:46:04,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 672.7ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 19:46:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 886. [2021-07-13 19:46:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4237288135593222) internal successors, (3030), 885 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3030 transitions. [2021-07-13 19:46:04,458 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3030 transitions. Word has length 20 [2021-07-13 19:46:04,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:04,458 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3030 transitions. [2021-07-13 19:46:04,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:04,458 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3030 transitions. [2021-07-13 19:46:04,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:04,459 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:04,459 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:04,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3776,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,660 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:04,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2099261610, now seen corresponding path program 273 times [2021-07-13 19:46:04,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:04,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516131013] [2021-07-13 19:46:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516131013] [2021-07-13 19:46:04,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516131013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044825429] [2021-07-13 19:46:04,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:04,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:04,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:04,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:04,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:04,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044825429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:04,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:04,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:04,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572658107] [2021-07-13 19:46:04,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:04,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:04,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:04,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:04,956 INFO L87 Difference]: Start difference. First operand 886 states and 3030 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:05,688 INFO L93 Difference]: Finished difference Result 1165 states and 3782 transitions. [2021-07-13 19:46:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:05,690 INFO L225 Difference]: With dead ends: 1165 [2021-07-13 19:46:05,690 INFO L226 Difference]: Without dead ends: 1165 [2021-07-13 19:46:05,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 682.7ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-13 19:46:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 885. [2021-07-13 19:46:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-07-13 19:46:05,702 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-07-13 19:46:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:05,702 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-07-13 19:46:05,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-07-13 19:46:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:05,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:05,703 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:05,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3784,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:05,904 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash 827655738, now seen corresponding path program 274 times [2021-07-13 19:46:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:05,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024765340] [2021-07-13 19:46:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:05,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:05,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024765340] [2021-07-13 19:46:05,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024765340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:05,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145568916] [2021-07-13 19:46:05,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:06,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:06,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:06,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:06,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145568916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:06,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:06,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:06,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321107878] [2021-07-13 19:46:06,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:06,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:06,202 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:06,769 INFO L93 Difference]: Finished difference Result 1195 states and 3822 transitions. [2021-07-13 19:46:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:06,771 INFO L225 Difference]: With dead ends: 1195 [2021-07-13 19:46:06,771 INFO L226 Difference]: Without dead ends: 1189 [2021-07-13 19:46:06,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 547.7ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-07-13 19:46:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 895. [2021-07-13 19:46:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4149888143176734) internal successors, (3053), 894 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3053 transitions. [2021-07-13 19:46:06,783 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3053 transitions. Word has length 20 [2021-07-13 19:46:06,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:06,783 INFO L482 AbstractCegarLoop]: Abstraction has 895 states and 3053 transitions. [2021-07-13 19:46:06,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:06,783 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3053 transitions. [2021-07-13 19:46:06,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:06,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:06,784 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:06,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3792 [2021-07-13 19:46:06,984 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1087768188, now seen corresponding path program 275 times [2021-07-13 19:46:06,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:06,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600166194] [2021-07-13 19:46:06,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:07,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:07,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600166194] [2021-07-13 19:46:07,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600166194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:07,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331031623] [2021-07-13 19:46:07,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:07,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:07,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:07,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:07,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:07,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331031623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:07,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:07,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:07,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850710012] [2021-07-13 19:46:07,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:07,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:07,300 INFO L87 Difference]: Start difference. First operand 895 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:07,982 INFO L93 Difference]: Finished difference Result 1106 states and 3625 transitions. [2021-07-13 19:46:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:07,984 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 19:46:07,984 INFO L226 Difference]: Without dead ends: 1106 [2021-07-13 19:46:07,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 684.4ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:07,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-07-13 19:46:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 885. [2021-07-13 19:46:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.420814479638009) internal successors, (3024), 884 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3024 transitions. [2021-07-13 19:46:07,996 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3024 transitions. Word has length 20 [2021-07-13 19:46:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:07,996 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3024 transitions. [2021-07-13 19:46:07,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:07,996 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3024 transitions. [2021-07-13 19:46:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:07,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:07,997 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:08,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3798,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:08,198 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1323250086, now seen corresponding path program 276 times [2021-07-13 19:46:08,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:08,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535566729] [2021-07-13 19:46:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:08,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:08,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535566729] [2021-07-13 19:46:08,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535566729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:08,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579323228] [2021-07-13 19:46:08,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:08,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:08,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:08,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:08,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579323228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459198946] [2021-07-13 19:46:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:08,510 INFO L87 Difference]: Start difference. First operand 885 states and 3024 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:09,109 INFO L93 Difference]: Finished difference Result 1107 states and 3596 transitions. [2021-07-13 19:46:09,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:09,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:09,111 INFO L225 Difference]: With dead ends: 1107 [2021-07-13 19:46:09,111 INFO L226 Difference]: Without dead ends: 1107 [2021-07-13 19:46:09,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 583.1ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1107 states. [2021-07-13 19:46:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1107 to 884. [2021-07-13 19:46:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.419026047565119) internal successors, (3019), 883 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3019 transitions. [2021-07-13 19:46:09,122 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3019 transitions. Word has length 20 [2021-07-13 19:46:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:09,122 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3019 transitions. [2021-07-13 19:46:09,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3019 transitions. [2021-07-13 19:46:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:09,124 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:09,124 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:09,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3805 [2021-07-13 19:46:09,324 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:09,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:09,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1347379442, now seen corresponding path program 277 times [2021-07-13 19:46:09,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:09,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122969261] [2021-07-13 19:46:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122969261] [2021-07-13 19:46:09,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122969261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107284290] [2021-07-13 19:46:09,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:09,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:09,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:09,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107284290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:09,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:09,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146816443] [2021-07-13 19:46:09,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:09,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:09,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:09,658 INFO L87 Difference]: Start difference. First operand 884 states and 3019 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:09,986 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-07-13 19:46:10,210 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-07-13 19:46:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:10,386 INFO L93 Difference]: Finished difference Result 1071 states and 3516 transitions. [2021-07-13 19:46:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:10,388 INFO L225 Difference]: With dead ends: 1071 [2021-07-13 19:46:10,388 INFO L226 Difference]: Without dead ends: 1071 [2021-07-13 19:46:10,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:10,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-07-13 19:46:10,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 872. [2021-07-13 19:46:10,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.421354764638347) internal successors, (2980), 871 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2980 transitions. [2021-07-13 19:46:10,399 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2980 transitions. Word has length 20 [2021-07-13 19:46:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:10,399 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2980 transitions. [2021-07-13 19:46:10,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:10,399 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2980 transitions. [2021-07-13 19:46:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:10,400 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:10,400 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:10,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3815 [2021-07-13 19:46:10,601 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash 188874260, now seen corresponding path program 278 times [2021-07-13 19:46:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:10,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359726192] [2021-07-13 19:46:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:10,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359726192] [2021-07-13 19:46:10,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359726192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:10,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313500892] [2021-07-13 19:46:10,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:10,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:10,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:10,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:10,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:10,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313500892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:10,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:10,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056811400] [2021-07-13 19:46:10,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:10,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:10,920 INFO L87 Difference]: Start difference. First operand 872 states and 2980 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:11,371 INFO L93 Difference]: Finished difference Result 1207 states and 3830 transitions. [2021-07-13 19:46:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:11,373 INFO L225 Difference]: With dead ends: 1207 [2021-07-13 19:46:11,373 INFO L226 Difference]: Without dead ends: 1200 [2021-07-13 19:46:11,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-13 19:46:11,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 892. [2021-07-13 19:46:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-07-13 19:46:11,385 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-07-13 19:46:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:11,385 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-07-13 19:46:11,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-07-13 19:46:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:11,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:11,386 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:11,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3830,307 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:11,586 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:11,587 INFO L82 PathProgramCache]: Analyzing trace with hash -2044728718, now seen corresponding path program 279 times [2021-07-13 19:46:11,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:11,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607531283] [2021-07-13 19:46:11,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607531283] [2021-07-13 19:46:11,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607531283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357909847] [2021-07-13 19:46:11,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:11,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357909847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:11,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:11,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:11,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906216723] [2021-07-13 19:46:11,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:11,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:11,898 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:12,577 INFO L93 Difference]: Finished difference Result 1234 states and 3901 transitions. [2021-07-13 19:46:12,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:12,577 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:12,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:12,579 INFO L225 Difference]: With dead ends: 1234 [2021-07-13 19:46:12,579 INFO L226 Difference]: Without dead ends: 1234 [2021-07-13 19:46:12,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-07-13 19:46:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 892. [2021-07-13 19:46:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.420875420875421) internal successors, (3048), 891 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3048 transitions. [2021-07-13 19:46:12,591 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3048 transitions. Word has length 20 [2021-07-13 19:46:12,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:12,591 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3048 transitions. [2021-07-13 19:46:12,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:12,591 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3048 transitions. [2021-07-13 19:46:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:12,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:12,592 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:12,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3839 [2021-07-13 19:46:12,792 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:12,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash 189378776, now seen corresponding path program 280 times [2021-07-13 19:46:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:12,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216115059] [2021-07-13 19:46:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:12,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216115059] [2021-07-13 19:46:12,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216115059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:12,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232023331] [2021-07-13 19:46:12,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:12,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:12,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:13,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232023331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:13,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:13,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:13,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788013620] [2021-07-13 19:46:13,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:13,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:13,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:13,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:13,109 INFO L87 Difference]: Start difference. First operand 892 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:13,875 INFO L93 Difference]: Finished difference Result 1226 states and 3873 transitions. [2021-07-13 19:46:13,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:13,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:13,877 INFO L225 Difference]: With dead ends: 1226 [2021-07-13 19:46:13,878 INFO L226 Difference]: Without dead ends: 1220 [2021-07-13 19:46:13,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 717.6ms TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:13,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-13 19:46:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 892. [2021-07-13 19:46:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 3.4175084175084174) internal successors, (3045), 891 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 3045 transitions. [2021-07-13 19:46:13,889 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 3045 transitions. Word has length 20 [2021-07-13 19:46:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:13,889 INFO L482 AbstractCegarLoop]: Abstraction has 892 states and 3045 transitions. [2021-07-13 19:46:13,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 3045 transitions. [2021-07-13 19:46:13,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:13,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:13,891 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:14,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3847 [2021-07-13 19:46:14,091 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:14,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:14,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1251564058, now seen corresponding path program 281 times [2021-07-13 19:46:14,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:14,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344777598] [2021-07-13 19:46:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:14,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344777598] [2021-07-13 19:46:14,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344777598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:14,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808264102] [2021-07-13 19:46:14,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:14,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:14,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:14,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:14,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:14,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808264102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:14,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:14,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736841845] [2021-07-13 19:46:14,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:14,403 INFO L87 Difference]: Start difference. First operand 892 states and 3045 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:14,976 INFO L93 Difference]: Finished difference Result 1191 states and 3783 transitions. [2021-07-13 19:46:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:14,978 INFO L225 Difference]: With dead ends: 1191 [2021-07-13 19:46:14,978 INFO L226 Difference]: Without dead ends: 1191 [2021-07-13 19:46:14,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:14,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-07-13 19:46:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 889. [2021-07-13 19:46:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.420045045045045) internal successors, (3037), 888 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3037 transitions. [2021-07-13 19:46:14,990 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3037 transitions. Word has length 20 [2021-07-13 19:46:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:14,990 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3037 transitions. [2021-07-13 19:46:14,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3037 transitions. [2021-07-13 19:46:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:14,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:14,992 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:15,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3858 [2021-07-13 19:46:15,210 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:15,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:15,210 INFO L82 PathProgramCache]: Analyzing trace with hash 727234354, now seen corresponding path program 282 times [2021-07-13 19:46:15,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:15,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238502426] [2021-07-13 19:46:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:15,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:15,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238502426] [2021-07-13 19:46:15,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238502426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892627805] [2021-07-13 19:46:15,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:15,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:15,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:15,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892627805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:15,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:15,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:15,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660119266] [2021-07-13 19:46:15,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:15,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:15,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:15,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:15,528 INFO L87 Difference]: Start difference. First operand 889 states and 3037 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:16,221 INFO L93 Difference]: Finished difference Result 1135 states and 3660 transitions. [2021-07-13 19:46:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:16,223 INFO L225 Difference]: With dead ends: 1135 [2021-07-13 19:46:16,223 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:46:16,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:46:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 889. [2021-07-13 19:46:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4166666666666665) internal successors, (3034), 888 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3034 transitions. [2021-07-13 19:46:16,235 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3034 transitions. Word has length 20 [2021-07-13 19:46:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:16,235 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3034 transitions. [2021-07-13 19:46:16,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3034 transitions. [2021-07-13 19:46:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:16,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:16,236 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3864,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:16,436 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash 897232478, now seen corresponding path program 283 times [2021-07-13 19:46:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749826942] [2021-07-13 19:46:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:16,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:16,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:16,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749826942] [2021-07-13 19:46:16,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749826942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:16,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962451303] [2021-07-13 19:46:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:16,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:16,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962451303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:16,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:16,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:16,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245312661] [2021-07-13 19:46:16,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:16,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:16,729 INFO L87 Difference]: Start difference. First operand 889 states and 3034 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:17,145 INFO L93 Difference]: Finished difference Result 1101 states and 3597 transitions. [2021-07-13 19:46:17,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:17,147 INFO L225 Difference]: With dead ends: 1101 [2021-07-13 19:46:17,147 INFO L226 Difference]: Without dead ends: 1101 [2021-07-13 19:46:17,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2021-07-13 19:46:17,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 886. [2021-07-13 19:46:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 3.4192090395480226) internal successors, (3026), 885 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 3026 transitions. [2021-07-13 19:46:17,158 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 3026 transitions. Word has length 20 [2021-07-13 19:46:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:17,158 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 3026 transitions. [2021-07-13 19:46:17,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:17,158 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 3026 transitions. [2021-07-13 19:46:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:17,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:17,159 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:17,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3870 [2021-07-13 19:46:17,360 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:17,360 INFO L82 PathProgramCache]: Analyzing trace with hash 2007451358, now seen corresponding path program 284 times [2021-07-13 19:46:17,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:17,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145680931] [2021-07-13 19:46:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:17,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145680931] [2021-07-13 19:46:17,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145680931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127748642] [2021-07-13 19:46:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:17,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:17,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:17,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:17,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127748642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:17,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:17,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:17,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979352049] [2021-07-13 19:46:17,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:17,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:17,648 INFO L87 Difference]: Start difference. First operand 886 states and 3026 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:18,168 INFO L93 Difference]: Finished difference Result 1288 states and 4031 transitions. [2021-07-13 19:46:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:18,170 INFO L225 Difference]: With dead ends: 1288 [2021-07-13 19:46:18,170 INFO L226 Difference]: Without dead ends: 1281 [2021-07-13 19:46:18,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 485.6ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:18,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-07-13 19:46:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 894. [2021-07-13 19:46:18,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 3.4300111982082866) internal successors, (3063), 893 states have internal predecessors, (3063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 3063 transitions. [2021-07-13 19:46:18,183 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 3063 transitions. Word has length 20 [2021-07-13 19:46:18,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:18,184 INFO L482 AbstractCegarLoop]: Abstraction has 894 states and 3063 transitions. [2021-07-13 19:46:18,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:18,184 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 3063 transitions. [2021-07-13 19:46:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:18,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:18,185 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:18,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3875,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:18,385 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -793103700, now seen corresponding path program 285 times [2021-07-13 19:46:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:18,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111380759] [2021-07-13 19:46:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:18,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111380759] [2021-07-13 19:46:18,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111380759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:18,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26361802] [2021-07-13 19:46:18,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:18,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:18,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:18,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:18,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:18,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26361802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:18,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:18,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329940926] [2021-07-13 19:46:18,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:18,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:18,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:18,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:18,717 INFO L87 Difference]: Start difference. First operand 894 states and 3063 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:19,499 INFO L93 Difference]: Finished difference Result 1340 states and 4181 transitions. [2021-07-13 19:46:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:19,501 INFO L225 Difference]: With dead ends: 1340 [2021-07-13 19:46:19,501 INFO L226 Difference]: Without dead ends: 1340 [2021-07-13 19:46:19,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-07-13 19:46:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 898. [2021-07-13 19:46:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4370122630992195) internal successors, (3083), 897 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:19,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3083 transitions. [2021-07-13 19:46:19,514 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3083 transitions. Word has length 20 [2021-07-13 19:46:19,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:19,514 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3083 transitions. [2021-07-13 19:46:19,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3083 transitions. [2021-07-13 19:46:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:19,516 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:19,516 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:19,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3884,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:19,716 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2007955874, now seen corresponding path program 286 times [2021-07-13 19:46:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:19,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496820975] [2021-07-13 19:46:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:19,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496820975] [2021-07-13 19:46:19,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496820975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:19,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127396145] [2021-07-13 19:46:19,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:19,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:19,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:20,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127396145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:20,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:20,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:20,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319376040] [2021-07-13 19:46:20,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:20,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:20,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:20,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:20,028 INFO L87 Difference]: Start difference. First operand 898 states and 3083 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:20,843 INFO L93 Difference]: Finished difference Result 1332 states and 4147 transitions. [2021-07-13 19:46:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:46:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:20,846 INFO L225 Difference]: With dead ends: 1332 [2021-07-13 19:46:20,846 INFO L226 Difference]: Without dead ends: 1326 [2021-07-13 19:46:20,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 777.4ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:46:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-13 19:46:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 904. [2021-07-13 19:46:20,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.425249169435216) internal successors, (3093), 903 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 3093 transitions. [2021-07-13 19:46:20,859 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 3093 transitions. Word has length 20 [2021-07-13 19:46:20,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:20,859 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 3093 transitions. [2021-07-13 19:46:20,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 3093 transitions. [2021-07-13 19:46:20,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:20,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:20,860 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:21,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3892 [2021-07-13 19:46:21,060 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 567013040, now seen corresponding path program 287 times [2021-07-13 19:46:21,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:21,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171294165] [2021-07-13 19:46:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:21,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:21,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171294165] [2021-07-13 19:46:21,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171294165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848938964] [2021-07-13 19:46:21,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:21,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:21,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:21,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848938964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:21,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:21,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:21,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292765465] [2021-07-13 19:46:21,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:21,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:21,388 INFO L87 Difference]: Start difference. First operand 904 states and 3093 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:21,956 INFO L93 Difference]: Finished difference Result 1236 states and 3915 transitions. [2021-07-13 19:46:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:21,957 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:21,959 INFO L225 Difference]: With dead ends: 1236 [2021-07-13 19:46:21,959 INFO L226 Difference]: Without dead ends: 1236 [2021-07-13 19:46:21,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 560.1ms TimeCoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:21,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-07-13 19:46:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 898. [2021-07-13 19:46:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.423634336677815) internal successors, (3071), 897 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3071 transitions. [2021-07-13 19:46:21,971 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3071 transitions. Word has length 20 [2021-07-13 19:46:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:21,971 INFO L482 AbstractCegarLoop]: Abstraction has 898 states and 3071 transitions. [2021-07-13 19:46:21,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3071 transitions. [2021-07-13 19:46:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:21,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:21,972 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:22,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3902,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:22,173 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 822314614, now seen corresponding path program 288 times [2021-07-13 19:46:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:22,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382562788] [2021-07-13 19:46:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:22,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:22,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382562788] [2021-07-13 19:46:22,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382562788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:22,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35791244] [2021-07-13 19:46:22,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:22,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:22,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:22,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:22,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35791244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:22,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:22,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:22,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63168280] [2021-07-13 19:46:22,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:22,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:22,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:22,500 INFO L87 Difference]: Start difference. First operand 898 states and 3071 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:23,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:23,018 INFO L93 Difference]: Finished difference Result 1208 states and 3845 transitions. [2021-07-13 19:46:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:23,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:23,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:23,020 INFO L225 Difference]: With dead ends: 1208 [2021-07-13 19:46:23,020 INFO L226 Difference]: Without dead ends: 1201 [2021-07-13 19:46:23,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 524.6ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:23,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2021-07-13 19:46:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 902. [2021-07-13 19:46:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.4239733629300777) internal successors, (3085), 901 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 3085 transitions. [2021-07-13 19:46:23,032 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 3085 transitions. Word has length 20 [2021-07-13 19:46:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:23,032 INFO L482 AbstractCegarLoop]: Abstraction has 902 states and 3085 transitions. [2021-07-13 19:46:23,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 3085 transitions. [2021-07-13 19:46:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:23,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:23,033 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:23,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3910 [2021-07-13 19:46:23,234 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:23,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1104749858, now seen corresponding path program 289 times [2021-07-13 19:46:23,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:23,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002532416] [2021-07-13 19:46:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:23,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002532416] [2021-07-13 19:46:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002532416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827313876] [2021-07-13 19:46:23,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:23,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:23,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827313876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:23,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:23,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:23,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436910340] [2021-07-13 19:46:23,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:23,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:23,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:23,610 INFO L87 Difference]: Start difference. First operand 902 states and 3085 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:24,201 INFO L93 Difference]: Finished difference Result 1154 states and 3724 transitions. [2021-07-13 19:46:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:24,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:24,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:24,203 INFO L225 Difference]: With dead ends: 1154 [2021-07-13 19:46:24,203 INFO L226 Difference]: Without dead ends: 1154 [2021-07-13 19:46:24,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-07-13 19:46:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 900. [2021-07-13 19:46:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4260289210233594) internal successors, (3080), 899 states have internal predecessors, (3080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3080 transitions. [2021-07-13 19:46:24,216 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3080 transitions. Word has length 20 [2021-07-13 19:46:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:24,216 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3080 transitions. [2021-07-13 19:46:24,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3080 transitions. [2021-07-13 19:46:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:24,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:24,217 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:24,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3919 [2021-07-13 19:46:24,418 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash -41703262, now seen corresponding path program 290 times [2021-07-13 19:46:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:24,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169981856] [2021-07-13 19:46:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:24,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169981856] [2021-07-13 19:46:24,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169981856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439229795] [2021-07-13 19:46:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:24,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:24,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:24,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439229795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:24,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:24,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985832322] [2021-07-13 19:46:24,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:24,733 INFO L87 Difference]: Start difference. First operand 900 states and 3080 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:25,394 INFO L93 Difference]: Finished difference Result 1167 states and 3761 transitions. [2021-07-13 19:46:25,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:25,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:25,396 INFO L225 Difference]: With dead ends: 1167 [2021-07-13 19:46:25,396 INFO L226 Difference]: Without dead ends: 1167 [2021-07-13 19:46:25,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2021-07-13 19:46:25,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 891. [2021-07-13 19:46:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4303370786516854) internal successors, (3053), 890 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3053 transitions. [2021-07-13 19:46:25,407 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3053 transitions. Word has length 20 [2021-07-13 19:46:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:25,408 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3053 transitions. [2021-07-13 19:46:25,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:25,408 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3053 transitions. [2021-07-13 19:46:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:25,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:25,409 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:25,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3926 [2021-07-13 19:46:25,609 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1250639138, now seen corresponding path program 291 times [2021-07-13 19:46:25,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:25,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327487650] [2021-07-13 19:46:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:25,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327487650] [2021-07-13 19:46:25,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327487650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:25,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132755694] [2021-07-13 19:46:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:25,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:46:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:25,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:25,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:25,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132755694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:25,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:25,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:25,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379724115] [2021-07-13 19:46:25,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:25,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:25,937 INFO L87 Difference]: Start difference. First operand 891 states and 3053 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:26,644 INFO L93 Difference]: Finished difference Result 1153 states and 3724 transitions. [2021-07-13 19:46:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:26,646 INFO L225 Difference]: With dead ends: 1153 [2021-07-13 19:46:26,646 INFO L226 Difference]: Without dead ends: 1153 [2021-07-13 19:46:26,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2021-07-13 19:46:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 890. [2021-07-13 19:46:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-07-13 19:46:26,658 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-07-13 19:46:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:26,658 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-07-13 19:46:26,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:26,658 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-07-13 19:46:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:26,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:26,659 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:26,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3934 [2021-07-13 19:46:26,860 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:26,860 INFO L82 PathProgramCache]: Analyzing trace with hash -20966734, now seen corresponding path program 292 times [2021-07-13 19:46:26,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:26,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740008141] [2021-07-13 19:46:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:26,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740008141] [2021-07-13 19:46:26,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740008141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:26,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715040667] [2021-07-13 19:46:26,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:27,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:27,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:27,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:27,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715040667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:27,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:27,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:27,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912365156] [2021-07-13 19:46:27,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:27,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:27,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:27,167 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:27,982 INFO L93 Difference]: Finished difference Result 1254 states and 3951 transitions. [2021-07-13 19:46:27,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:27,984 INFO L225 Difference]: With dead ends: 1254 [2021-07-13 19:46:27,984 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 19:46:27,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 775.5ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 19:46:27,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 900. [2021-07-13 19:46:27,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.4193548387096775) internal successors, (3074), 899 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 3074 transitions. [2021-07-13 19:46:27,996 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 3074 transitions. Word has length 20 [2021-07-13 19:46:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:27,996 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 3074 transitions. [2021-07-13 19:46:27,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 3074 transitions. [2021-07-13 19:46:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:27,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:27,997 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:28,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3941,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:28,198 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1936390660, now seen corresponding path program 293 times [2021-07-13 19:46:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:28,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597300096] [2021-07-13 19:46:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:28,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597300096] [2021-07-13 19:46:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597300096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677863530] [2021-07-13 19:46:28,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:28,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:28,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:28,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677863530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:28,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:28,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:28,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345826292] [2021-07-13 19:46:28,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:28,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:28,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:28,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:28,597 INFO L87 Difference]: Start difference. First operand 900 states and 3074 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:29,468 INFO L93 Difference]: Finished difference Result 1159 states and 3739 transitions. [2021-07-13 19:46:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:29,468 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:29,470 INFO L225 Difference]: With dead ends: 1159 [2021-07-13 19:46:29,470 INFO L226 Difference]: Without dead ends: 1159 [2021-07-13 19:46:29,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 865.6ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:46:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-07-13 19:46:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 890. [2021-07-13 19:46:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4274465691788527) internal successors, (3047), 889 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3047 transitions. [2021-07-13 19:46:29,482 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3047 transitions. Word has length 20 [2021-07-13 19:46:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:29,482 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3047 transitions. [2021-07-13 19:46:29,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3047 transitions. [2021-07-13 19:46:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:29,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:29,483 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:29,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3954 [2021-07-13 19:46:29,684 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash 474627614, now seen corresponding path program 294 times [2021-07-13 19:46:29,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:29,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973193183] [2021-07-13 19:46:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:29,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:29,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973193183] [2021-07-13 19:46:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973193183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78997744] [2021-07-13 19:46:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:29,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:29,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:29,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:29,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:29,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78997744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:29,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:29,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:29,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059132079] [2021-07-13 19:46:29,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:29,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:29,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:29,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:29,985 INFO L87 Difference]: Start difference. First operand 890 states and 3047 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:30,475 INFO L93 Difference]: Finished difference Result 1176 states and 3789 transitions. [2021-07-13 19:46:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:30,476 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:30,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:30,477 INFO L225 Difference]: With dead ends: 1176 [2021-07-13 19:46:30,478 INFO L226 Difference]: Without dead ends: 1176 [2021-07-13 19:46:30,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:30,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-07-13 19:46:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 893. [2021-07-13 19:46:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 3.4327354260089686) internal successors, (3062), 892 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 3062 transitions. [2021-07-13 19:46:30,489 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 3062 transitions. Word has length 20 [2021-07-13 19:46:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:30,489 INFO L482 AbstractCegarLoop]: Abstraction has 893 states and 3062 transitions. [2021-07-13 19:46:30,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 3062 transitions. [2021-07-13 19:46:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:30,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:30,490 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:30,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3969,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:30,691 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:30,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2098965382, now seen corresponding path program 295 times [2021-07-13 19:46:30,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:30,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066545262] [2021-07-13 19:46:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:30,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:30,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066545262] [2021-07-13 19:46:30,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066545262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:30,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9542233] [2021-07-13 19:46:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9542233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:31,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:31,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:31,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751361499] [2021-07-13 19:46:31,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:31,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:31,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:31,004 INFO L87 Difference]: Start difference. First operand 893 states and 3062 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:31,503 INFO L93 Difference]: Finished difference Result 1140 states and 3709 transitions. [2021-07-13 19:46:31,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:31,505 INFO L225 Difference]: With dead ends: 1140 [2021-07-13 19:46:31,505 INFO L226 Difference]: Without dead ends: 1140 [2021-07-13 19:46:31,505 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2021-07-13 19:46:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 889. [2021-07-13 19:46:31,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-07-13 19:46:31,516 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-07-13 19:46:31,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:31,516 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-07-13 19:46:31,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:31,516 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-07-13 19:46:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:31,517 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:31,517 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:31,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3978 [2021-07-13 19:46:31,718 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:31,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2039824350, now seen corresponding path program 296 times [2021-07-13 19:46:31,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:31,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57232415] [2021-07-13 19:46:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:31,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57232415] [2021-07-13 19:46:31,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57232415] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:31,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739415796] [2021-07-13 19:46:31,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:31,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:31,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:31,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:32,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739415796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:32,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:32,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061584920] [2021-07-13 19:46:32,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:32,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:32,067 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,663 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-13 19:46:32,800 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-07-13 19:46:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:32,966 INFO L93 Difference]: Finished difference Result 1129 states and 3651 transitions. [2021-07-13 19:46:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:32,967 INFO L225 Difference]: With dead ends: 1129 [2021-07-13 19:46:32,968 INFO L226 Difference]: Without dead ends: 1117 [2021-07-13 19:46:32,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 929.2ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2021-07-13 19:46:32,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 891. [2021-07-13 19:46:32,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-07-13 19:46:32,979 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-07-13 19:46:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:32,979 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-07-13 19:46:32,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-07-13 19:46:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:32,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:32,980 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:33,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3985,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,181 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:33,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:33,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1288423912, now seen corresponding path program 297 times [2021-07-13 19:46:33,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:33,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15856155] [2021-07-13 19:46:33,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:33,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15856155] [2021-07-13 19:46:33,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15856155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320131170] [2021-07-13 19:46:33,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:33,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:33,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:33,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:33,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320131170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:33,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:33,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:33,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380593096] [2021-07-13 19:46:33,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:33,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:33,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:33,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:33,508 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:34,364 INFO L93 Difference]: Finished difference Result 1154 states and 3703 transitions. [2021-07-13 19:46:34,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:34,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:34,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:34,366 INFO L225 Difference]: With dead ends: 1154 [2021-07-13 19:46:34,366 INFO L226 Difference]: Without dead ends: 1148 [2021-07-13 19:46:34,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 825.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:34,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-07-13 19:46:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 901. [2021-07-13 19:46:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.4166666666666665) internal successors, (3075), 900 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 3075 transitions. [2021-07-13 19:46:34,378 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 3075 transitions. Word has length 20 [2021-07-13 19:46:34,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:34,378 INFO L482 AbstractCegarLoop]: Abstraction has 901 states and 3075 transitions. [2021-07-13 19:46:34,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:34,378 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 3075 transitions. [2021-07-13 19:46:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:34,379 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:34,379 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:34,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3993,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:34,580 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:34,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:34,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1091119458, now seen corresponding path program 298 times [2021-07-13 19:46:34,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:34,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523304393] [2021-07-13 19:46:34,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:34,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523304393] [2021-07-13 19:46:34,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523304393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:34,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649497837] [2021-07-13 19:46:34,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:34,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:34,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:34,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649497837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:34,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:34,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:34,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264943509] [2021-07-13 19:46:34,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:34,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:34,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:34,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:34,939 INFO L87 Difference]: Start difference. First operand 901 states and 3075 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:35,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:35,696 INFO L93 Difference]: Finished difference Result 1047 states and 3461 transitions. [2021-07-13 19:46:35,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:35,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:35,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:35,698 INFO L225 Difference]: With dead ends: 1047 [2021-07-13 19:46:35,698 INFO L226 Difference]: Without dead ends: 1047 [2021-07-13 19:46:35,698 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:46:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-07-13 19:46:35,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 891. [2021-07-13 19:46:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.4247191011235953) internal successors, (3048), 890 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3048 transitions. [2021-07-13 19:46:35,709 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3048 transitions. Word has length 20 [2021-07-13 19:46:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:35,709 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3048 transitions. [2021-07-13 19:46:35,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:35,709 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3048 transitions. [2021-07-13 19:46:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:35,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:35,710 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:35,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4000 [2021-07-13 19:46:35,910 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1966715728, now seen corresponding path program 299 times [2021-07-13 19:46:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:35,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426147561] [2021-07-13 19:46:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:35,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:35,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426147561] [2021-07-13 19:46:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426147561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:35,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088704602] [2021-07-13 19:46:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:36,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:36,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:36,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:36,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:36,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088704602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:36,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:36,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210903781] [2021-07-13 19:46:36,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:36,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:36,216 INFO L87 Difference]: Start difference. First operand 891 states and 3048 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:36,677 INFO L93 Difference]: Finished difference Result 1089 states and 3574 transitions. [2021-07-13 19:46:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:36,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:36,679 INFO L225 Difference]: With dead ends: 1089 [2021-07-13 19:46:36,679 INFO L226 Difference]: Without dead ends: 1089 [2021-07-13 19:46:36,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-07-13 19:46:36,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 890. [2021-07-13 19:46:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.4263217097862766) internal successors, (3046), 889 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3046 transitions. [2021-07-13 19:46:36,690 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3046 transitions. Word has length 20 [2021-07-13 19:46:36,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:36,690 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3046 transitions. [2021-07-13 19:46:36,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3046 transitions. [2021-07-13 19:46:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:36,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:36,692 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:36,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4007,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:36,892 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1215315290, now seen corresponding path program 300 times [2021-07-13 19:46:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:36,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323932252] [2021-07-13 19:46:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:36,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323932252] [2021-07-13 19:46:36,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323932252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680238116] [2021-07-13 19:46:36,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:37,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:37,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:37,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:37,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:37,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680238116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:37,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:37,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:37,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161479796] [2021-07-13 19:46:37,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:37,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:37,235 INFO L87 Difference]: Start difference. First operand 890 states and 3046 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:37,758 INFO L93 Difference]: Finished difference Result 1109 states and 3613 transitions. [2021-07-13 19:46:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:37,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:37,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:37,761 INFO L225 Difference]: With dead ends: 1109 [2021-07-13 19:46:37,761 INFO L226 Difference]: Without dead ends: 1109 [2021-07-13 19:46:37,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-13 19:46:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 889. [2021-07-13 19:46:37,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 3.4245495495495497) internal successors, (3041), 888 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 3041 transitions. [2021-07-13 19:46:37,781 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 3041 transitions. Word has length 20 [2021-07-13 19:46:37,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:37,781 INFO L482 AbstractCegarLoop]: Abstraction has 889 states and 3041 transitions. [2021-07-13 19:46:37,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:37,781 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 3041 transitions. [2021-07-13 19:46:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:37,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:37,782 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:37,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4011 [2021-07-13 19:46:37,982 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:37,983 INFO L82 PathProgramCache]: Analyzing trace with hash 409022478, now seen corresponding path program 301 times [2021-07-13 19:46:37,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:37,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814053591] [2021-07-13 19:46:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:38,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:38,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814053591] [2021-07-13 19:46:38,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814053591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:38,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500783675] [2021-07-13 19:46:38,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:38,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:38,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:38,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500783675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:38,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:38,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:46:38,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744287155] [2021-07-13 19:46:38,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:46:38,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:46:38,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:46:38,280 INFO L87 Difference]: Start difference. First operand 889 states and 3041 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:38,770 INFO L93 Difference]: Finished difference Result 1067 states and 3518 transitions. [2021-07-13 19:46:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:38,772 INFO L225 Difference]: With dead ends: 1067 [2021-07-13 19:46:38,772 INFO L226 Difference]: Without dead ends: 1067 [2021-07-13 19:46:38,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-13 19:46:38,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 875. [2021-07-13 19:46:38,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-07-13 19:46:38,783 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-07-13 19:46:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:38,783 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-07-13 19:46:38,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-07-13 19:46:38,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:38,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:38,784 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:38,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4017,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:38,984 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:38,985 INFO L82 PathProgramCache]: Analyzing trace with hash 174967158, now seen corresponding path program 302 times [2021-07-13 19:46:38,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:38,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685593804] [2021-07-13 19:46:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:39,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:39,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685593804] [2021-07-13 19:46:39,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685593804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367113818] [2021-07-13 19:46:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:39,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367113818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:39,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770717860] [2021-07-13 19:46:39,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:39,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:39,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:39,243 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:39,511 INFO L93 Difference]: Finished difference Result 1056 states and 3460 transitions. [2021-07-13 19:46:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:39,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:39,513 INFO L225 Difference]: With dead ends: 1056 [2021-07-13 19:46:39,513 INFO L226 Difference]: Without dead ends: 1056 [2021-07-13 19:46:39,514 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-07-13 19:46:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 875. [2021-07-13 19:46:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4244851258581237) internal successors, (2993), 874 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 2993 transitions. [2021-07-13 19:46:39,525 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 2993 transitions. Word has length 20 [2021-07-13 19:46:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:39,525 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 2993 transitions. [2021-07-13 19:46:39,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 2993 transitions. [2021-07-13 19:46:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:39,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:39,526 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:39,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4024 [2021-07-13 19:46:39,726 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:39,727 INFO L82 PathProgramCache]: Analyzing trace with hash 262399376, now seen corresponding path program 303 times [2021-07-13 19:46:39,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:39,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466933510] [2021-07-13 19:46:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:39,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466933510] [2021-07-13 19:46:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466933510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531478508] [2021-07-13 19:46:39,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:39,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:39,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531478508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:39,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:39,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:39,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090134569] [2021-07-13 19:46:39,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:39,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:39,987 INFO L87 Difference]: Start difference. First operand 875 states and 2993 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:40,498 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-07-13 19:46:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:40,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:40,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:40,500 INFO L225 Difference]: With dead ends: 1164 [2021-07-13 19:46:40,500 INFO L226 Difference]: Without dead ends: 1157 [2021-07-13 19:46:40,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-07-13 19:46:40,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 888. [2021-07-13 19:46:40,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-07-13 19:46:40,511 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-07-13 19:46:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:40,511 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-07-13 19:46:40,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:40,511 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-07-13 19:46:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:40,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:40,513 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:40,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4026,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:40,713 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1971203602, now seen corresponding path program 304 times [2021-07-13 19:46:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:40,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775870442] [2021-07-13 19:46:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:40,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:40,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775870442] [2021-07-13 19:46:40,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775870442] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:40,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31094961] [2021-07-13 19:46:40,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:40,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:40,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31094961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:40,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:40,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:40,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048224340] [2021-07-13 19:46:40,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:40,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:40,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:40,966 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:41,353 INFO L93 Difference]: Finished difference Result 1111 states and 3595 transitions. [2021-07-13 19:46:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:41,355 INFO L225 Difference]: With dead ends: 1111 [2021-07-13 19:46:41,355 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:46:41,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:46:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 888. [2021-07-13 19:46:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-07-13 19:46:41,366 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-07-13 19:46:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:41,366 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-07-13 19:46:41,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-07-13 19:46:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:41,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:41,367 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:41,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4031 [2021-07-13 19:46:41,568 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash 262903892, now seen corresponding path program 305 times [2021-07-13 19:46:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:41,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286149897] [2021-07-13 19:46:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:41,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286149897] [2021-07-13 19:46:41,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286149897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:41,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495442539] [2021-07-13 19:46:41,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:41,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:41,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:41,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:41,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:41,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495442539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:41,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:41,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:41,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2958422] [2021-07-13 19:46:41,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:41,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:41,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:41,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:41,819 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:42,099 INFO L93 Difference]: Finished difference Result 1075 states and 3507 transitions. [2021-07-13 19:46:42,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:42,100 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:42,101 INFO L225 Difference]: With dead ends: 1075 [2021-07-13 19:46:42,101 INFO L226 Difference]: Without dead ends: 1069 [2021-07-13 19:46:42,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:42,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-07-13 19:46:42,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 888. [2021-07-13 19:46:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.416009019165727) internal successors, (3030), 887 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3030 transitions. [2021-07-13 19:46:42,112 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3030 transitions. Word has length 20 [2021-07-13 19:46:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:42,112 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3030 transitions. [2021-07-13 19:46:42,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3030 transitions. [2021-07-13 19:46:42,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:42,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:42,114 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:42,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4035 [2021-07-13 19:46:42,314 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:42,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:42,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1178038942, now seen corresponding path program 306 times [2021-07-13 19:46:42,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:42,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609312901] [2021-07-13 19:46:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:42,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:42,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609312901] [2021-07-13 19:46:42,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609312901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:42,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492411410] [2021-07-13 19:46:42,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:42,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:42,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492411410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:42,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:42,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:42,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418804142] [2021-07-13 19:46:42,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:42,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:42,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:42,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:42,587 INFO L87 Difference]: Start difference. First operand 888 states and 3030 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:42,936 INFO L93 Difference]: Finished difference Result 1121 states and 3616 transitions. [2021-07-13 19:46:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:42,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:42,938 INFO L225 Difference]: With dead ends: 1121 [2021-07-13 19:46:42,938 INFO L226 Difference]: Without dead ends: 1121 [2021-07-13 19:46:42,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-07-13 19:46:42,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 872. [2021-07-13 19:46:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4270952927669347) internal successors, (2985), 871 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2985 transitions. [2021-07-13 19:46:42,950 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2985 transitions. Word has length 20 [2021-07-13 19:46:42,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:42,950 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2985 transitions. [2021-07-13 19:46:42,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:42,950 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2985 transitions. [2021-07-13 19:46:42,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:42,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:42,951 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:43,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4039,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:43,152 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:43,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1844384744, now seen corresponding path program 307 times [2021-07-13 19:46:43,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:43,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488008620] [2021-07-13 19:46:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:43,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488008620] [2021-07-13 19:46:43,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488008620] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128127317] [2021-07-13 19:46:43,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:43,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:43,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:43,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128127317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:43,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:43,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:43,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855320121] [2021-07-13 19:46:43,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:43,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:43,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:43,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:43,398 INFO L87 Difference]: Start difference. First operand 872 states and 2985 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:43,839 INFO L93 Difference]: Finished difference Result 1217 states and 3835 transitions. [2021-07-13 19:46:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:46:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:43,841 INFO L225 Difference]: With dead ends: 1217 [2021-07-13 19:46:43,841 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:46:43,841 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 404.7ms TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:46:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 888. [2021-07-13 19:46:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-07-13 19:46:43,853 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-07-13 19:46:43,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:43,853 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-07-13 19:46:43,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-07-13 19:46:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:43,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:43,854 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:44,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4045,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:44,055 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 216979574, now seen corresponding path program 308 times [2021-07-13 19:46:44,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:44,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767699189] [2021-07-13 19:46:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:44,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:44,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767699189] [2021-07-13 19:46:44,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767699189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:44,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968611910] [2021-07-13 19:46:44,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:44,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:44,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:44,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:44,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968611910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:44,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:44,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:44,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670789970] [2021-07-13 19:46:44,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:44,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:44,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:44,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:44,321 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:44,629 INFO L93 Difference]: Finished difference Result 1088 states and 3535 transitions. [2021-07-13 19:46:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:44,631 INFO L225 Difference]: With dead ends: 1088 [2021-07-13 19:46:44,631 INFO L226 Difference]: Without dead ends: 1088 [2021-07-13 19:46:44,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 322.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-07-13 19:46:44,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 888. [2021-07-13 19:46:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.422773393461105) internal successors, (3036), 887 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3036 transitions. [2021-07-13 19:46:44,642 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3036 transitions. Word has length 20 [2021-07-13 19:46:44,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:44,642 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3036 transitions. [2021-07-13 19:46:44,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:44,642 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3036 transitions. [2021-07-13 19:46:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:44,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:44,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:44,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4051 [2021-07-13 19:46:44,844 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1843880228, now seen corresponding path program 309 times [2021-07-13 19:46:44,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:44,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320124169] [2021-07-13 19:46:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:44,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320124169] [2021-07-13 19:46:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320124169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206726126] [2021-07-13 19:46:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:45,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:45,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:45,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206726126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:45,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:45,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:45,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950519773] [2021-07-13 19:46:45,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:45,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:45,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:45,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:45,117 INFO L87 Difference]: Start difference. First operand 888 states and 3036 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:45,492 INFO L93 Difference]: Finished difference Result 1065 states and 3484 transitions. [2021-07-13 19:46:45,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:45,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:45,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:45,494 INFO L225 Difference]: With dead ends: 1065 [2021-07-13 19:46:45,494 INFO L226 Difference]: Without dead ends: 1059 [2021-07-13 19:46:45,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-07-13 19:46:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 888. [2021-07-13 19:46:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.419391206313416) internal successors, (3033), 887 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3033 transitions. [2021-07-13 19:46:45,505 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3033 transitions. Word has length 20 [2021-07-13 19:46:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:45,505 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3033 transitions. [2021-07-13 19:46:45,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3033 transitions. [2021-07-13 19:46:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:45,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:45,506 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:45,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4056 [2021-07-13 19:46:45,706 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:45,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:45,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1010144234, now seen corresponding path program 310 times [2021-07-13 19:46:45,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:45,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477225426] [2021-07-13 19:46:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477225426] [2021-07-13 19:46:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477225426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:45,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362456856] [2021-07-13 19:46:45,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:45,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:45,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:45,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362456856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:45,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:45,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:45,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314197413] [2021-07-13 19:46:45,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:45,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:45,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:45,962 INFO L87 Difference]: Start difference. First operand 888 states and 3033 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:46,425 INFO L93 Difference]: Finished difference Result 1174 states and 3755 transitions. [2021-07-13 19:46:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:46,427 INFO L225 Difference]: With dead ends: 1174 [2021-07-13 19:46:46,427 INFO L226 Difference]: Without dead ends: 1174 [2021-07-13 19:46:46,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:46:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-07-13 19:46:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 885. [2021-07-13 19:46:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 3.421945701357466) internal successors, (3025), 884 states have internal predecessors, (3025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 3025 transitions. [2021-07-13 19:46:46,440 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 3025 transitions. Word has length 20 [2021-07-13 19:46:46,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:46,440 INFO L482 AbstractCegarLoop]: Abstraction has 885 states and 3025 transitions. [2021-07-13 19:46:46,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:46,440 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 3025 transitions. [2021-07-13 19:46:46,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:46,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:46,441 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:46,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4063 [2021-07-13 19:46:46,641 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:46,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1136026526, now seen corresponding path program 311 times [2021-07-13 19:46:46,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:46,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891529815] [2021-07-13 19:46:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:46,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:46,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891529815] [2021-07-13 19:46:46,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891529815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:46,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783909828] [2021-07-13 19:46:46,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:46,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:46,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:46,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:46,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783909828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:46,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:46,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:46,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088152723] [2021-07-13 19:46:46,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:46,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:46,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:46,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:46,887 INFO L87 Difference]: Start difference. First operand 885 states and 3025 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:47,247 INFO L93 Difference]: Finished difference Result 1133 states and 3648 transitions. [2021-07-13 19:46:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:47,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:47,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:47,249 INFO L225 Difference]: With dead ends: 1133 [2021-07-13 19:46:47,249 INFO L226 Difference]: Without dead ends: 1133 [2021-07-13 19:46:47,249 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:47,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-07-13 19:46:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 866. [2021-07-13 19:46:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.432369942196532) internal successors, (2969), 865 states have internal predecessors, (2969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2969 transitions. [2021-07-13 19:46:47,261 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2969 transitions. Word has length 20 [2021-07-13 19:46:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:47,261 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2969 transitions. [2021-07-13 19:46:47,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2969 transitions. [2021-07-13 19:46:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:47,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:47,262 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:47,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4067 [2021-07-13 19:46:47,462 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:47,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1678669926, now seen corresponding path program 312 times [2021-07-13 19:46:47,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:47,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604308195] [2021-07-13 19:46:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:47,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:47,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604308195] [2021-07-13 19:46:47,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604308195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:47,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89076909] [2021-07-13 19:46:47,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:47,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:47,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:47,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:47,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:47,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89076909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:47,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:47,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:47,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182073358] [2021-07-13 19:46:47,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:47,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:47,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:47,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:47,750 INFO L87 Difference]: Start difference. First operand 866 states and 2969 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:48,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:48,192 INFO L93 Difference]: Finished difference Result 1166 states and 3748 transitions. [2021-07-13 19:46:48,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:48,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:48,194 INFO L225 Difference]: With dead ends: 1166 [2021-07-13 19:46:48,194 INFO L226 Difference]: Without dead ends: 1166 [2021-07-13 19:46:48,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-13 19:46:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 875. [2021-07-13 19:46:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 3.4347826086956523) internal successors, (3002), 874 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 3002 transitions. [2021-07-13 19:46:48,205 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 3002 transitions. Word has length 20 [2021-07-13 19:46:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:48,206 INFO L482 AbstractCegarLoop]: Abstraction has 875 states and 3002 transitions. [2021-07-13 19:46:48,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 3002 transitions. [2021-07-13 19:46:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:48,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:48,207 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:48,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4070 [2021-07-13 19:46:48,407 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:48,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1122389648, now seen corresponding path program 313 times [2021-07-13 19:46:48,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:48,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961114297] [2021-07-13 19:46:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:48,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961114297] [2021-07-13 19:46:48,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961114297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933540040] [2021-07-13 19:46:48,471 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:48,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933540040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:48,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:48,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050410435] [2021-07-13 19:46:48,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:48,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:48,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:48,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:48,692 INFO L87 Difference]: Start difference. First operand 875 states and 3002 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:49,190 INFO L93 Difference]: Finished difference Result 1172 states and 3755 transitions. [2021-07-13 19:46:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:46:49,191 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:49,192 INFO L225 Difference]: With dead ends: 1172 [2021-07-13 19:46:49,192 INFO L226 Difference]: Without dead ends: 1166 [2021-07-13 19:46:49,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:46:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-13 19:46:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 872. [2021-07-13 19:46:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4339839265212397) internal successors, (2991), 871 states have internal predecessors, (2991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2991 transitions. [2021-07-13 19:46:49,204 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2991 transitions. Word has length 20 [2021-07-13 19:46:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:49,204 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2991 transitions. [2021-07-13 19:46:49,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2991 transitions. [2021-07-13 19:46:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:49,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:49,205 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:49,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4076,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:49,406 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1660245226, now seen corresponding path program 314 times [2021-07-13 19:46:49,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:49,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030578106] [2021-07-13 19:46:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:49,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030578106] [2021-07-13 19:46:49,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030578106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:49,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513161389] [2021-07-13 19:46:49,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:49,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:49,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:49,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513161389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:49,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:49,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:46:49,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171232133] [2021-07-13 19:46:49,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:46:49,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:49,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:46:49,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:46:49,695 INFO L87 Difference]: Start difference. First operand 872 states and 2991 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:50,074 INFO L93 Difference]: Finished difference Result 1136 states and 3673 transitions. [2021-07-13 19:46:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:50,075 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:50,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:50,076 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 19:46:50,076 INFO L226 Difference]: Without dead ends: 1124 [2021-07-13 19:46:50,077 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 424.9ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:46:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-07-13 19:46:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 869. [2021-07-13 19:46:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4331797235023043) internal successors, (2980), 868 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2980 transitions. [2021-07-13 19:46:50,087 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2980 transitions. Word has length 20 [2021-07-13 19:46:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:50,087 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2980 transitions. [2021-07-13 19:46:50,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2980 transitions. [2021-07-13 19:46:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:50,089 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:50,089 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:50,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4082 [2021-07-13 19:46:50,289 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2046976748, now seen corresponding path program 315 times [2021-07-13 19:46:50,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:50,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894397237] [2021-07-13 19:46:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:50,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:50,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894397237] [2021-07-13 19:46:50,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894397237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:50,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294547631] [2021-07-13 19:46:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:50,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:50,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:50,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:50,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294547631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:50,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:50,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:46:50,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910353221] [2021-07-13 19:46:50,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:46:50,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:50,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:46:50,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:46:50,549 INFO L87 Difference]: Start difference. First operand 869 states and 2980 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:50,905 INFO L93 Difference]: Finished difference Result 1127 states and 3649 transitions. [2021-07-13 19:46:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:46:50,906 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:50,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:50,907 INFO L225 Difference]: With dead ends: 1127 [2021-07-13 19:46:50,907 INFO L226 Difference]: Without dead ends: 1109 [2021-07-13 19:46:50,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:46:50,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-07-13 19:46:50,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 863. [2021-07-13 19:46:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4350348027842226) internal successors, (2961), 862 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2961 transitions. [2021-07-13 19:46:50,919 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2961 transitions. Word has length 20 [2021-07-13 19:46:50,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:50,919 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2961 transitions. [2021-07-13 19:46:50,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:50,919 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2961 transitions. [2021-07-13 19:46:50,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:50,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:50,920 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:51,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4086,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:51,120 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:51,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:51,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1189722200, now seen corresponding path program 316 times [2021-07-13 19:46:51,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:51,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141127469] [2021-07-13 19:46:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:51,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:51,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141127469] [2021-07-13 19:46:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141127469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689704935] [2021-07-13 19:46:51,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:51,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:51,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:51,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:51,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:51,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689704935] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:51,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:51,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:51,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077545138] [2021-07-13 19:46:51,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:51,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:51,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:51,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:51,402 INFO L87 Difference]: Start difference. First operand 863 states and 2961 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:51,843 INFO L93 Difference]: Finished difference Result 1078 states and 3489 transitions. [2021-07-13 19:46:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:46:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:51,845 INFO L225 Difference]: With dead ends: 1078 [2021-07-13 19:46:51,845 INFO L226 Difference]: Without dead ends: 1064 [2021-07-13 19:46:51,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-13 19:46:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 863. [2021-07-13 19:46:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4315545243619487) internal successors, (2958), 862 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2958 transitions. [2021-07-13 19:46:51,856 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2958 transitions. Word has length 20 [2021-07-13 19:46:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:51,856 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2958 transitions. [2021-07-13 19:46:51,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2958 transitions. [2021-07-13 19:46:51,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:51,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:51,857 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:52,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4090 [2021-07-13 19:46:52,058 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1313897980, now seen corresponding path program 317 times [2021-07-13 19:46:52,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:52,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666198067] [2021-07-13 19:46:52,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:52,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666198067] [2021-07-13 19:46:52,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666198067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318817484] [2021-07-13 19:46:52,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:52,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:46:52,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:52,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:52,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318817484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:52,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:52,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:52,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323318381] [2021-07-13 19:46:52,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:52,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:52,331 INFO L87 Difference]: Start difference. First operand 863 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:52,700 INFO L93 Difference]: Finished difference Result 1029 states and 3380 transitions. [2021-07-13 19:46:52,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:52,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:52,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:52,702 INFO L225 Difference]: With dead ends: 1029 [2021-07-13 19:46:52,702 INFO L226 Difference]: Without dead ends: 1029 [2021-07-13 19:46:52,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-07-13 19:46:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 860. [2021-07-13 19:46:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.430733410942957) internal successors, (2947), 859 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2947 transitions. [2021-07-13 19:46:52,727 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2947 transitions. Word has length 20 [2021-07-13 19:46:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:52,727 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2947 transitions. [2021-07-13 19:46:52,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2947 transitions. [2021-07-13 19:46:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:52,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:52,729 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:52,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4096 [2021-07-13 19:46:52,945 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:52,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:52,945 INFO L82 PathProgramCache]: Analyzing trace with hash -832272780, now seen corresponding path program 318 times [2021-07-13 19:46:52,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:52,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629104964] [2021-07-13 19:46:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629104964] [2021-07-13 19:46:53,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629104964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738466477] [2021-07-13 19:46:53,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:53,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:46:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:53,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738466477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:53,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:53,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:53,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146156261] [2021-07-13 19:46:53,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:53,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:53,222 INFO L87 Difference]: Start difference. First operand 860 states and 2947 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:53,714 INFO L93 Difference]: Finished difference Result 1090 states and 3531 transitions. [2021-07-13 19:46:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:46:53,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:53,716 INFO L225 Difference]: With dead ends: 1090 [2021-07-13 19:46:53,716 INFO L226 Difference]: Without dead ends: 1090 [2021-07-13 19:46:53,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:46:53,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-13 19:46:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 857. [2021-07-13 19:46:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.433411214953271) internal successors, (2939), 856 states have internal predecessors, (2939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2939 transitions. [2021-07-13 19:46:53,727 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2939 transitions. Word has length 20 [2021-07-13 19:46:53,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:53,727 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2939 transitions. [2021-07-13 19:46:53,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:53,727 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2939 transitions. [2021-07-13 19:46:53,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:53,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:53,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:53,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4098 [2021-07-13 19:46:53,928 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash -39108120, now seen corresponding path program 319 times [2021-07-13 19:46:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:53,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939384190] [2021-07-13 19:46:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:53,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:53,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939384190] [2021-07-13 19:46:53,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939384190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:53,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683753881] [2021-07-13 19:46:53,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:54,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683753881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:54,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:54,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:54,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132424950] [2021-07-13 19:46:54,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:54,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:54,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:54,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:54,228 INFO L87 Difference]: Start difference. First operand 857 states and 2939 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:54,670 INFO L93 Difference]: Finished difference Result 1090 states and 3526 transitions. [2021-07-13 19:46:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:54,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:54,672 INFO L225 Difference]: With dead ends: 1090 [2021-07-13 19:46:54,672 INFO L226 Difference]: Without dead ends: 1090 [2021-07-13 19:46:54,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:54,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-07-13 19:46:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 854. [2021-07-13 19:46:54,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4361078546307153) internal successors, (2931), 853 states have internal predecessors, (2931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2931 transitions. [2021-07-13 19:46:54,683 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2931 transitions. Word has length 20 [2021-07-13 19:46:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:54,683 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2931 transitions. [2021-07-13 19:46:54,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2931 transitions. [2021-07-13 19:46:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:54,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:54,684 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:54,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4102,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:54,885 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2145892240, now seen corresponding path program 320 times [2021-07-13 19:46:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:54,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117710526] [2021-07-13 19:46:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:54,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117710526] [2021-07-13 19:46:54,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117710526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:54,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956189241] [2021-07-13 19:46:54,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:55,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:55,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:55,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956189241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:55,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:55,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740126882] [2021-07-13 19:46:55,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:55,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:55,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:55,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:55,172 INFO L87 Difference]: Start difference. First operand 854 states and 2931 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:55,902 INFO L93 Difference]: Finished difference Result 1223 states and 3849 transitions. [2021-07-13 19:46:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:46:55,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:55,904 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 19:46:55,904 INFO L226 Difference]: Without dead ends: 1223 [2021-07-13 19:46:55,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=214, Invalid=778, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:46:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2021-07-13 19:46:55,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 857. [2021-07-13 19:46:55,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.44392523364486) internal successors, (2948), 856 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2948 transitions. [2021-07-13 19:46:55,916 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2948 transitions. Word has length 20 [2021-07-13 19:46:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:55,916 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2948 transitions. [2021-07-13 19:46:55,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2948 transitions. [2021-07-13 19:46:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:55,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:55,918 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:56,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4110 [2021-07-13 19:46:56,118 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash -167093828, now seen corresponding path program 321 times [2021-07-13 19:46:56,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:56,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631506696] [2021-07-13 19:46:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:56,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:56,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631506696] [2021-07-13 19:46:56,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631506696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:56,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712122119] [2021-07-13 19:46:56,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:56,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:46:56,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:56,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:56,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712122119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:56,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:56,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056204999] [2021-07-13 19:46:56,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:56,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:56,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:56,423 INFO L87 Difference]: Start difference. First operand 857 states and 2948 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:56,835 INFO L93 Difference]: Finished difference Result 1066 states and 3463 transitions. [2021-07-13 19:46:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:56,837 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 19:46:56,837 INFO L226 Difference]: Without dead ends: 1054 [2021-07-13 19:46:56,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 399.3ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-07-13 19:46:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 857. [2021-07-13 19:46:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4404205607476634) internal successors, (2945), 856 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2945 transitions. [2021-07-13 19:46:56,848 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2945 transitions. Word has length 20 [2021-07-13 19:46:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:56,848 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2945 transitions. [2021-07-13 19:46:56,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:56,848 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2945 transitions. [2021-07-13 19:46:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:56,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:56,849 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:57,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4116 [2021-07-13 19:46:57,049 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2904296, now seen corresponding path program 322 times [2021-07-13 19:46:57,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:57,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897137758] [2021-07-13 19:46:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:57,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:57,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897137758] [2021-07-13 19:46:57,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897137758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:57,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099398102] [2021-07-13 19:46:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:57,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:46:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:57,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099398102] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:57,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:57,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009081788] [2021-07-13 19:46:57,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:57,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:57,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:57,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:57,321 INFO L87 Difference]: Start difference. First operand 857 states and 2945 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:57,770 INFO L93 Difference]: Finished difference Result 1099 states and 3547 transitions. [2021-07-13 19:46:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:46:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:57,772 INFO L225 Difference]: With dead ends: 1099 [2021-07-13 19:46:57,772 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:46:57,772 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:46:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:46:57,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 845. [2021-07-13 19:46:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-07-13 19:46:57,783 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-07-13 19:46:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:57,783 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-07-13 19:46:57,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-07-13 19:46:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:57,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:57,784 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4120 [2021-07-13 19:46:57,984 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1566267888, now seen corresponding path program 323 times [2021-07-13 19:46:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177461000] [2021-07-13 19:46:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:58,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:58,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177461000] [2021-07-13 19:46:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177461000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:58,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601225507] [2021-07-13 19:46:58,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:58,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:46:58,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:58,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:58,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:58,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601225507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:58,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:58,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:58,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39090712] [2021-07-13 19:46:58,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:58,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:58,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:58,278 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:58,706 INFO L93 Difference]: Finished difference Result 1061 states and 3467 transitions. [2021-07-13 19:46:58,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:46:58,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:58,708 INFO L225 Difference]: With dead ends: 1061 [2021-07-13 19:46:58,708 INFO L226 Difference]: Without dead ends: 1061 [2021-07-13 19:46:58,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:46:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-07-13 19:46:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 852. [2021-07-13 19:46:58,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4418331374853115) internal successors, (2929), 851 states have internal predecessors, (2929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2929 transitions. [2021-07-13 19:46:58,719 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2929 transitions. Word has length 20 [2021-07-13 19:46:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:58,719 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2929 transitions. [2021-07-13 19:46:58,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2929 transitions. [2021-07-13 19:46:58,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:58,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:58,720 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:46:58,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4122,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:58,920 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:46:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:46:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -857909670, now seen corresponding path program 324 times [2021-07-13 19:46:58,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:46:58,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976603018] [2021-07-13 19:46:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:46:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:46:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:58,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:46:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976603018] [2021-07-13 19:46:58,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976603018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:58,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252402843] [2021-07-13 19:46:58,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:46:59,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:46:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:46:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:46:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:46:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:46:59,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252402843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:46:59,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:46:59,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:46:59,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552155167] [2021-07-13 19:46:59,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:46:59,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:46:59,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:46:59,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:46:59,237 INFO L87 Difference]: Start difference. First operand 852 states and 2929 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:46:59,872 INFO L93 Difference]: Finished difference Result 1210 states and 3806 transitions. [2021-07-13 19:46:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:46:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:46:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:46:59,874 INFO L225 Difference]: With dead ends: 1210 [2021-07-13 19:46:59,874 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:46:59,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:46:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:46:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 852. [2021-07-13 19:46:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-07-13 19:46:59,886 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-07-13 19:46:59,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:46:59,886 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-07-13 19:46:59,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:46:59,886 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-07-13 19:46:59,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:46:59,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:46:59,887 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:00,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4127,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:00,088 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:00,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1267059590, now seen corresponding path program 325 times [2021-07-13 19:47:00,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:00,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058567180] [2021-07-13 19:47:00,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:00,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:00,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058567180] [2021-07-13 19:47:00,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058567180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:00,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094137292] [2021-07-13 19:47:00,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:00,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:00,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094137292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:00,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:00,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:00,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113401982] [2021-07-13 19:47:00,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:00,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:00,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:00,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:00,444 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:00,809 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-07-13 19:47:00,998 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2021-07-13 19:47:01,145 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-07-13 19:47:01,398 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-07-13 19:47:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:01,463 INFO L93 Difference]: Finished difference Result 1081 states and 3503 transitions. [2021-07-13 19:47:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:01,465 INFO L225 Difference]: With dead ends: 1081 [2021-07-13 19:47:01,465 INFO L226 Difference]: Without dead ends: 1067 [2021-07-13 19:47:01,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:01,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-07-13 19:47:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 854. [2021-07-13 19:47:01,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4490035169988276) internal successors, (2942), 853 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2942 transitions. [2021-07-13 19:47:01,476 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2942 transitions. Word has length 20 [2021-07-13 19:47:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:01,476 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2942 transitions. [2021-07-13 19:47:01,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2942 transitions. [2021-07-13 19:47:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:01,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:01,477 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:01,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4135,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:01,677 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1657603102, now seen corresponding path program 326 times [2021-07-13 19:47:01,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:01,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445680103] [2021-07-13 19:47:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:01,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:01,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445680103] [2021-07-13 19:47:01,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445680103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20088466] [2021-07-13 19:47:01,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:01,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:01,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:01,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:02,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20088466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:02,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:02,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:02,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768847059] [2021-07-13 19:47:02,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:02,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:02,016 INFO L87 Difference]: Start difference. First operand 854 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,727 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-07-13 19:47:02,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:02,944 INFO L93 Difference]: Finished difference Result 1106 states and 3555 transitions. [2021-07-13 19:47:02,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:02,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:02,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:02,946 INFO L225 Difference]: With dead ends: 1106 [2021-07-13 19:47:02,946 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:47:02,946 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 879.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:47:02,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 865. [2021-07-13 19:47:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4386574074074074) internal successors, (2971), 864 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2971 transitions. [2021-07-13 19:47:02,957 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2971 transitions. Word has length 20 [2021-07-13 19:47:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:02,957 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2971 transitions. [2021-07-13 19:47:02,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:02,957 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2971 transitions. [2021-07-13 19:47:02,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:02,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:02,958 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:03,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4144 [2021-07-13 19:47:03,158 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:03,159 INFO L82 PathProgramCache]: Analyzing trace with hash 890756954, now seen corresponding path program 327 times [2021-07-13 19:47:03,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:03,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568473631] [2021-07-13 19:47:03,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:03,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568473631] [2021-07-13 19:47:03,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568473631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:03,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566644545] [2021-07-13 19:47:03,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:03,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:47:03,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:03,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:03,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566644545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:03,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:03,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089795647] [2021-07-13 19:47:03,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:03,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:03,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:03,506 INFO L87 Difference]: Start difference. First operand 865 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:04,253 INFO L93 Difference]: Finished difference Result 1010 states and 3342 transitions. [2021-07-13 19:47:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:04,253 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:04,255 INFO L225 Difference]: With dead ends: 1010 [2021-07-13 19:47:04,255 INFO L226 Difference]: Without dead ends: 1010 [2021-07-13 19:47:04,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 751.9ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-13 19:47:04,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 852. [2021-07-13 19:47:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4488836662749707) internal successors, (2935), 851 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2935 transitions. [2021-07-13 19:47:04,265 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2935 transitions. Word has length 20 [2021-07-13 19:47:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:04,265 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2935 transitions. [2021-07-13 19:47:04,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2935 transitions. [2021-07-13 19:47:04,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:04,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:04,266 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:04,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4150,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:04,467 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:04,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:04,467 INFO L82 PathProgramCache]: Analyzing trace with hash 252309210, now seen corresponding path program 328 times [2021-07-13 19:47:04,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:04,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515827534] [2021-07-13 19:47:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:04,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:04,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515827534] [2021-07-13 19:47:04,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515827534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:04,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714132256] [2021-07-13 19:47:04,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:04,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:04,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714132256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:04,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:04,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:04,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699035162] [2021-07-13 19:47:04,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:04,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:04,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:04,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:04,781 INFO L87 Difference]: Start difference. First operand 852 states and 2935 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:05,202 INFO L93 Difference]: Finished difference Result 1054 states and 3451 transitions. [2021-07-13 19:47:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:05,204 INFO L225 Difference]: With dead ends: 1054 [2021-07-13 19:47:05,204 INFO L226 Difference]: Without dead ends: 1054 [2021-07-13 19:47:05,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-07-13 19:47:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 848. [2021-07-13 19:47:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.446280991735537) internal successors, (2919), 847 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2919 transitions. [2021-07-13 19:47:05,215 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2919 transitions. Word has length 20 [2021-07-13 19:47:05,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:05,215 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2919 transitions. [2021-07-13 19:47:05,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2919 transitions. [2021-07-13 19:47:05,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:05,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:05,217 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:05,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4157,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:05,417 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:05,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:05,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1435075290, now seen corresponding path program 329 times [2021-07-13 19:47:05,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:05,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273656538] [2021-07-13 19:47:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:05,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273656538] [2021-07-13 19:47:05,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273656538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687102672] [2021-07-13 19:47:05,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:05,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:05,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:05,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:05,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687102672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:05,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:05,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:05,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072001227] [2021-07-13 19:47:05,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:05,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:05,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:05,739 INFO L87 Difference]: Start difference. First operand 848 states and 2919 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:06,225 INFO L93 Difference]: Finished difference Result 1066 states and 3480 transitions. [2021-07-13 19:47:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:06,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:06,227 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 19:47:06,227 INFO L226 Difference]: Without dead ends: 1066 [2021-07-13 19:47:06,228 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-13 19:47:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 849. [2021-07-13 19:47:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4492924528301887) internal successors, (2925), 848 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:06,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2925 transitions. [2021-07-13 19:47:06,238 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2925 transitions. Word has length 20 [2021-07-13 19:47:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:06,238 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2925 transitions. [2021-07-13 19:47:06,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2925 transitions. [2021-07-13 19:47:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:06,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:06,239 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:06,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4162 [2021-07-13 19:47:06,440 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:06,440 INFO L82 PathProgramCache]: Analyzing trace with hash -522061666, now seen corresponding path program 330 times [2021-07-13 19:47:06,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:06,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325901124] [2021-07-13 19:47:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:06,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:06,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325901124] [2021-07-13 19:47:06,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325901124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:06,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177379820] [2021-07-13 19:47:06,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:06,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:47:06,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:06,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177379820] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:06,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:06,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920250533] [2021-07-13 19:47:06,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:06,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:06,809 INFO L87 Difference]: Start difference. First operand 849 states and 2925 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:07,316 INFO L93 Difference]: Finished difference Result 1033 states and 3403 transitions. [2021-07-13 19:47:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:07,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:07,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:07,318 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 19:47:07,318 INFO L226 Difference]: Without dead ends: 1033 [2021-07-13 19:47:07,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-07-13 19:47:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 845. [2021-07-13 19:47:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-07-13 19:47:07,328 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-07-13 19:47:07,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:07,328 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-07-13 19:47:07,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:07,328 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-07-13 19:47:07,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:07,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:07,329 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:07,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4171 [2021-07-13 19:47:07,530 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:07,530 INFO L82 PathProgramCache]: Analyzing trace with hash -921302818, now seen corresponding path program 331 times [2021-07-13 19:47:07,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:07,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093469262] [2021-07-13 19:47:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:07,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:07,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093469262] [2021-07-13 19:47:07,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093469262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:07,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603177227] [2021-07-13 19:47:07,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:07,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603177227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:07,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:07,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:07,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454641888] [2021-07-13 19:47:07,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:07,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:07,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:07,848 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:08,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:08,688 INFO L93 Difference]: Finished difference Result 1224 states and 3846 transitions. [2021-07-13 19:47:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:08,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:08,690 INFO L225 Difference]: With dead ends: 1224 [2021-07-13 19:47:08,690 INFO L226 Difference]: Without dead ends: 1217 [2021-07-13 19:47:08,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 776.4ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-13 19:47:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 860. [2021-07-13 19:47:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.441210710128056) internal successors, (2956), 859 states have internal predecessors, (2956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2956 transitions. [2021-07-13 19:47:08,702 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2956 transitions. Word has length 20 [2021-07-13 19:47:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:08,702 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2956 transitions. [2021-07-13 19:47:08,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2956 transitions. [2021-07-13 19:47:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:08,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:08,704 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4177,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:08,904 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:08,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:08,904 INFO L82 PathProgramCache]: Analyzing trace with hash 573109420, now seen corresponding path program 332 times [2021-07-13 19:47:08,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:08,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990532920] [2021-07-13 19:47:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:08,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:08,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:08,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990532920] [2021-07-13 19:47:08,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990532920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:08,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396067481] [2021-07-13 19:47:08,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:09,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:09,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:09,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396067481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:09,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821710388] [2021-07-13 19:47:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:09,200 INFO L87 Difference]: Start difference. First operand 860 states and 2956 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:09,818 INFO L93 Difference]: Finished difference Result 1219 states and 3862 transitions. [2021-07-13 19:47:09,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:09,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:09,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:09,821 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 19:47:09,821 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 19:47:09,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:09,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 19:47:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 864. [2021-07-13 19:47:09,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.4484356894553883) internal successors, (2976), 863 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2976 transitions. [2021-07-13 19:47:09,833 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2976 transitions. Word has length 20 [2021-07-13 19:47:09,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:09,833 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2976 transitions. [2021-07-13 19:47:09,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:09,833 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2976 transitions. [2021-07-13 19:47:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:09,834 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:09,834 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:10,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4187 [2021-07-13 19:47:10,034 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:10,035 INFO L82 PathProgramCache]: Analyzing trace with hash -920798302, now seen corresponding path program 333 times [2021-07-13 19:47:10,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:10,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760047142] [2021-07-13 19:47:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:10,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:10,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:10,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760047142] [2021-07-13 19:47:10,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760047142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:10,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501056192] [2021-07-13 19:47:10,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:10,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:10,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:10,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501056192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:10,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:10,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:10,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805423609] [2021-07-13 19:47:10,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:10,330 INFO L87 Difference]: Start difference. First operand 864 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:10,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:10,835 INFO L93 Difference]: Finished difference Result 1247 states and 3929 transitions. [2021-07-13 19:47:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:10,837 INFO L225 Difference]: With dead ends: 1247 [2021-07-13 19:47:10,837 INFO L226 Difference]: Without dead ends: 1241 [2021-07-13 19:47:10,837 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-07-13 19:47:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 870. [2021-07-13 19:47:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.436133486766398) internal successors, (2986), 869 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2986 transitions. [2021-07-13 19:47:10,849 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2986 transitions. Word has length 20 [2021-07-13 19:47:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:10,849 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2986 transitions. [2021-07-13 19:47:10,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2986 transitions. [2021-07-13 19:47:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:10,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:10,850 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:11,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4194,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:11,051 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:11,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:11,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1933226160, now seen corresponding path program 334 times [2021-07-13 19:47:11,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:11,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184510995] [2021-07-13 19:47:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:11,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184510995] [2021-07-13 19:47:11,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184510995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:11,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5610685] [2021-07-13 19:47:11,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:11,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:11,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:11,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5610685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:11,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:11,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:11,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683873337] [2021-07-13 19:47:11,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:11,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:11,408 INFO L87 Difference]: Start difference. First operand 870 states and 2986 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:12,197 INFO L93 Difference]: Finished difference Result 1257 states and 3946 transitions. [2021-07-13 19:47:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:12,199 INFO L225 Difference]: With dead ends: 1257 [2021-07-13 19:47:12,199 INFO L226 Difference]: Without dead ends: 1257 [2021-07-13 19:47:12,199 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-07-13 19:47:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 867. [2021-07-13 19:47:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.438799076212471) internal successors, (2978), 866 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2978 transitions. [2021-07-13 19:47:12,211 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2978 transitions. Word has length 20 [2021-07-13 19:47:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:12,211 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2978 transitions. [2021-07-13 19:47:12,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:12,211 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2978 transitions. [2021-07-13 19:47:12,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:12,212 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:12,212 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:12,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4201,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:12,413 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:12,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:12,413 INFO L82 PathProgramCache]: Analyzing trace with hash 261463262, now seen corresponding path program 335 times [2021-07-13 19:47:12,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:12,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759148971] [2021-07-13 19:47:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:12,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:12,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759148971] [2021-07-13 19:47:12,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759148971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:12,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104224027] [2021-07-13 19:47:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:12,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:12,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:12,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104224027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:12,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:12,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420935374] [2021-07-13 19:47:12,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:12,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:12,775 INFO L87 Difference]: Start difference. First operand 867 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:13,627 INFO L93 Difference]: Finished difference Result 1125 states and 3627 transitions. [2021-07-13 19:47:13,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:13,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:13,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:13,629 INFO L225 Difference]: With dead ends: 1125 [2021-07-13 19:47:13,629 INFO L226 Difference]: Without dead ends: 1125 [2021-07-13 19:47:13,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 832.7ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-07-13 19:47:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 869. [2021-07-13 19:47:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.4412442396313363) internal successors, (2987), 868 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2987 transitions. [2021-07-13 19:47:13,641 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2987 transitions. Word has length 20 [2021-07-13 19:47:13,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:13,641 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2987 transitions. [2021-07-13 19:47:13,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:13,641 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2987 transitions. [2021-07-13 19:47:13,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:13,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:13,642 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:13,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4217 [2021-07-13 19:47:13,842 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:13,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1324509858, now seen corresponding path program 336 times [2021-07-13 19:47:13,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:13,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457497486] [2021-07-13 19:47:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:13,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457497486] [2021-07-13 19:47:13,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457497486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:13,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031442596] [2021-07-13 19:47:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:47:14,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:14,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031442596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:14,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:14,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622332420] [2021-07-13 19:47:14,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:14,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:14,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:14,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:14,162 INFO L87 Difference]: Start difference. First operand 869 states and 2987 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:14,671 INFO L93 Difference]: Finished difference Result 1150 states and 3714 transitions. [2021-07-13 19:47:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:14,674 INFO L225 Difference]: With dead ends: 1150 [2021-07-13 19:47:14,674 INFO L226 Difference]: Without dead ends: 1150 [2021-07-13 19:47:14,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2021-07-13 19:47:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 860. [2021-07-13 19:47:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4458672875436553) internal successors, (2960), 859 states have internal predecessors, (2960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2960 transitions. [2021-07-13 19:47:14,685 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2960 transitions. Word has length 20 [2021-07-13 19:47:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:14,685 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2960 transitions. [2021-07-13 19:47:14,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2960 transitions. [2021-07-13 19:47:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:14,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:14,686 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:14,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:14,886 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1678115038, now seen corresponding path program 337 times [2021-07-13 19:47:14,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:14,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20857285] [2021-07-13 19:47:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:14,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:14,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20857285] [2021-07-13 19:47:14,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20857285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:14,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283974926] [2021-07-13 19:47:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283974926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:15,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:15,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:15,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201702938] [2021-07-13 19:47:15,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:15,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:15,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:15,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:15,192 INFO L87 Difference]: Start difference. First operand 860 states and 2960 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:15,679 INFO L93 Difference]: Finished difference Result 1119 states and 3647 transitions. [2021-07-13 19:47:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:47:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:15,681 INFO L225 Difference]: With dead ends: 1119 [2021-07-13 19:47:15,681 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:47:15,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 471.5ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:47:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 859. [2021-07-13 19:47:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-07-13 19:47:15,692 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-07-13 19:47:15,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:15,692 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-07-13 19:47:15,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-07-13 19:47:15,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:15,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:15,693 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:15,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4234,366 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:15,894 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:15,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1345246386, now seen corresponding path program 338 times [2021-07-13 19:47:15,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:15,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204320833] [2021-07-13 19:47:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:15,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204320833] [2021-07-13 19:47:15,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204320833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:15,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640963149] [2021-07-13 19:47:15,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:16,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:16,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:16,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:16,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640963149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:16,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:16,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21697525] [2021-07-13 19:47:16,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:16,204 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:16,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:16,743 INFO L93 Difference]: Finished difference Result 1150 states and 3688 transitions. [2021-07-13 19:47:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:16,745 INFO L225 Difference]: With dead ends: 1150 [2021-07-13 19:47:16,745 INFO L226 Difference]: Without dead ends: 1144 [2021-07-13 19:47:16,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-13 19:47:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 869. [2021-07-13 19:47:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.436635944700461) internal successors, (2983), 868 states have internal predecessors, (2983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2983 transitions. [2021-07-13 19:47:16,756 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2983 transitions. Word has length 20 [2021-07-13 19:47:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:16,756 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2983 transitions. [2021-07-13 19:47:16,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:16,757 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2983 transitions. [2021-07-13 19:47:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:16,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:16,758 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:16,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4241,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:16,958 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:16,958 INFO L82 PathProgramCache]: Analyzing trace with hash -570177540, now seen corresponding path program 339 times [2021-07-13 19:47:16,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:16,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359671939] [2021-07-13 19:47:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:16,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:17,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359671939] [2021-07-13 19:47:17,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359671939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:17,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190182273] [2021-07-13 19:47:17,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:17,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:17,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:17,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190182273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:17,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:17,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:17,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574667299] [2021-07-13 19:47:17,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:17,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:17,289 INFO L87 Difference]: Start difference. First operand 869 states and 2983 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:17,812 INFO L93 Difference]: Finished difference Result 1068 states and 3510 transitions. [2021-07-13 19:47:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:17,814 INFO L225 Difference]: With dead ends: 1068 [2021-07-13 19:47:17,814 INFO L226 Difference]: Without dead ends: 1068 [2021-07-13 19:47:17,814 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 534.1ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:17,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-07-13 19:47:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 859. [2021-07-13 19:47:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.4428904428904428) internal successors, (2954), 858 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2954 transitions. [2021-07-13 19:47:17,825 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2954 transitions. Word has length 20 [2021-07-13 19:47:17,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:17,825 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2954 transitions. [2021-07-13 19:47:17,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:17,825 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2954 transitions. [2021-07-13 19:47:17,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:17,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:17,826 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:18,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4247,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:18,027 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1840840734, now seen corresponding path program 340 times [2021-07-13 19:47:18,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:18,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609220150] [2021-07-13 19:47:18,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:18,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:18,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609220150] [2021-07-13 19:47:18,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609220150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:18,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301972282] [2021-07-13 19:47:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:18,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:18,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:18,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:18,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:18,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301972282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:18,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:18,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:18,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099863860] [2021-07-13 19:47:18,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:18,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:18,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:18,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:18,362 INFO L87 Difference]: Start difference. First operand 859 states and 2954 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:19,025 INFO L93 Difference]: Finished difference Result 1087 states and 3531 transitions. [2021-07-13 19:47:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:19,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:19,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:19,027 INFO L225 Difference]: With dead ends: 1087 [2021-07-13 19:47:19,027 INFO L226 Difference]: Without dead ends: 1087 [2021-07-13 19:47:19,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-13 19:47:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 851. [2021-07-13 19:47:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.451764705882353) internal successors, (2934), 850 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2934 transitions. [2021-07-13 19:47:19,038 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2934 transitions. Word has length 20 [2021-07-13 19:47:19,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:19,038 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2934 transitions. [2021-07-13 19:47:19,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2934 transitions. [2021-07-13 19:47:19,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:19,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:19,039 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:19,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-07-13 19:47:19,240 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:19,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -829788794, now seen corresponding path program 341 times [2021-07-13 19:47:19,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:19,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603097574] [2021-07-13 19:47:19,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603097574] [2021-07-13 19:47:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603097574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750888331] [2021-07-13 19:47:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:19,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:19,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750888331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819211747] [2021-07-13 19:47:19,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:19,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:19,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:19,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:19,612 INFO L87 Difference]: Start difference. First operand 851 states and 2934 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:20,287 INFO L93 Difference]: Finished difference Result 1051 states and 3444 transitions. [2021-07-13 19:47:20,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:20,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:20,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:20,289 INFO L225 Difference]: With dead ends: 1051 [2021-07-13 19:47:20,289 INFO L226 Difference]: Without dead ends: 1051 [2021-07-13 19:47:20,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-07-13 19:47:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 844. [2021-07-13 19:47:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.4377224199288254) internal successors, (2898), 843 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2898 transitions. [2021-07-13 19:47:20,300 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2898 transitions. Word has length 20 [2021-07-13 19:47:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:20,300 INFO L482 AbstractCegarLoop]: Abstraction has 844 states and 2898 transitions. [2021-07-13 19:47:20,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2898 transitions. [2021-07-13 19:47:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:20,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:20,302 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:20,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4262 [2021-07-13 19:47:20,502 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash 706464908, now seen corresponding path program 342 times [2021-07-13 19:47:20,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:20,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521435857] [2021-07-13 19:47:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:20,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:20,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521435857] [2021-07-13 19:47:20,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521435857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:20,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455262070] [2021-07-13 19:47:20,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:20,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:20,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:20,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:20,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:20,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455262070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:20,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:20,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:20,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802124742] [2021-07-13 19:47:20,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:20,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:20,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:20,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:20,792 INFO L87 Difference]: Start difference. First operand 844 states and 2898 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:21,313 INFO L93 Difference]: Finished difference Result 1200 states and 3788 transitions. [2021-07-13 19:47:21,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:21,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:21,315 INFO L225 Difference]: With dead ends: 1200 [2021-07-13 19:47:21,315 INFO L226 Difference]: Without dead ends: 1193 [2021-07-13 19:47:21,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-07-13 19:47:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 864. [2021-07-13 19:47:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-07-13 19:47:21,327 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-07-13 19:47:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:21,327 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-07-13 19:47:21,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-07-13 19:47:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:21,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:21,328 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:21,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4278,371 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:21,529 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:21,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:21,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1527138070, now seen corresponding path program 343 times [2021-07-13 19:47:21,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:21,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558962852] [2021-07-13 19:47:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:21,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558962852] [2021-07-13 19:47:21,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558962852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:21,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434228651] [2021-07-13 19:47:21,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434228651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:21,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:21,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:21,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165215738] [2021-07-13 19:47:21,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:21,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:21,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:21,867 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:22,443 INFO L93 Difference]: Finished difference Result 1123 states and 3606 transitions. [2021-07-13 19:47:22,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:22,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:22,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:22,445 INFO L225 Difference]: With dead ends: 1123 [2021-07-13 19:47:22,445 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:47:22,446 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:47:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 864. [2021-07-13 19:47:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.436848203939745) internal successors, (2966), 863 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2966 transitions. [2021-07-13 19:47:22,457 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2966 transitions. Word has length 20 [2021-07-13 19:47:22,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:22,457 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2966 transitions. [2021-07-13 19:47:22,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:22,457 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2966 transitions. [2021-07-13 19:47:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:22,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:22,458 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:22,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4285 [2021-07-13 19:47:22,659 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash 706969424, now seen corresponding path program 344 times [2021-07-13 19:47:22,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:22,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448633469] [2021-07-13 19:47:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:22,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:22,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448633469] [2021-07-13 19:47:22,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448633469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:22,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946017206] [2021-07-13 19:47:22,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:22,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:22,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:22,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:22,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946017206] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:22,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:22,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:22,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051544154] [2021-07-13 19:47:22,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:22,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:22,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:22,982 INFO L87 Difference]: Start difference. First operand 864 states and 2966 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:23,713 INFO L93 Difference]: Finished difference Result 1171 states and 3712 transitions. [2021-07-13 19:47:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:23,716 INFO L225 Difference]: With dead ends: 1171 [2021-07-13 19:47:23,716 INFO L226 Difference]: Without dead ends: 1165 [2021-07-13 19:47:23,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 678.9ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-07-13 19:47:23,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 864. [2021-07-13 19:47:23,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.433371958285052) internal successors, (2963), 863 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2963 transitions. [2021-07-13 19:47:23,727 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2963 transitions. Word has length 20 [2021-07-13 19:47:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:23,727 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2963 transitions. [2021-07-13 19:47:23,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2963 transitions. [2021-07-13 19:47:23,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:23,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:23,728 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:23,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4293 [2021-07-13 19:47:23,929 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -733973410, now seen corresponding path program 345 times [2021-07-13 19:47:23,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:23,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340559449] [2021-07-13 19:47:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:23,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:23,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340559449] [2021-07-13 19:47:23,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340559449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:23,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365105818] [2021-07-13 19:47:23,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:24,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:24,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365105818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:24,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:24,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:24,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251983031] [2021-07-13 19:47:24,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:24,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:24,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:24,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:24,233 INFO L87 Difference]: Start difference. First operand 864 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:25,159 INFO L93 Difference]: Finished difference Result 1294 states and 4005 transitions. [2021-07-13 19:47:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:47:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:25,161 INFO L225 Difference]: With dead ends: 1294 [2021-07-13 19:47:25,161 INFO L226 Difference]: Without dead ends: 1294 [2021-07-13 19:47:25,161 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 854.1ms TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:47:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2021-07-13 19:47:25,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 861. [2021-07-13 19:47:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.436046511627907) internal successors, (2955), 860 states have internal predecessors, (2955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2955 transitions. [2021-07-13 19:47:25,177 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2955 transitions. Word has length 20 [2021-07-13 19:47:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:25,177 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2955 transitions. [2021-07-13 19:47:25,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2955 transitions. [2021-07-13 19:47:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:25,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:25,178 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:25,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4301,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:25,379 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:25,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:25,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1244825002, now seen corresponding path program 346 times [2021-07-13 19:47:25,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:25,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760879095] [2021-07-13 19:47:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:25,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760879095] [2021-07-13 19:47:25,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760879095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:25,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393800831] [2021-07-13 19:47:25,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:25,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:25,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:25,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:25,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:25,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393800831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:25,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:25,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:25,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94036738] [2021-07-13 19:47:25,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:25,708 INFO L87 Difference]: Start difference. First operand 861 states and 2955 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:26,342 INFO L93 Difference]: Finished difference Result 1093 states and 3531 transitions. [2021-07-13 19:47:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:26,344 INFO L225 Difference]: With dead ends: 1093 [2021-07-13 19:47:26,344 INFO L226 Difference]: Without dead ends: 1081 [2021-07-13 19:47:26,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-07-13 19:47:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 861. [2021-07-13 19:47:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.432558139534884) internal successors, (2952), 860 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2952 transitions. [2021-07-13 19:47:26,361 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2952 transitions. Word has length 20 [2021-07-13 19:47:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:26,362 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2952 transitions. [2021-07-13 19:47:26,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:26,362 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2952 transitions. [2021-07-13 19:47:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:26,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:26,363 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:26,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4309,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:26,563 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:26,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:26,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1414823126, now seen corresponding path program 347 times [2021-07-13 19:47:26,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:26,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662924263] [2021-07-13 19:47:26,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:26,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662924263] [2021-07-13 19:47:26,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662924263] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:26,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964860107] [2021-07-13 19:47:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:26,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:26,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:26,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964860107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:26,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:26,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:26,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470462972] [2021-07-13 19:47:26,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:26,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:26,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:26,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:26,897 INFO L87 Difference]: Start difference. First operand 861 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:27,401 INFO L93 Difference]: Finished difference Result 1147 states and 3681 transitions. [2021-07-13 19:47:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:27,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:27,403 INFO L225 Difference]: With dead ends: 1147 [2021-07-13 19:47:27,403 INFO L226 Difference]: Without dead ends: 1147 [2021-07-13 19:47:27,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:27,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-07-13 19:47:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 858. [2021-07-13 19:47:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4352392065344226) internal successors, (2944), 857 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2944 transitions. [2021-07-13 19:47:27,414 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2944 transitions. Word has length 20 [2021-07-13 19:47:27,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:27,415 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2944 transitions. [2021-07-13 19:47:27,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:27,415 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2944 transitions. [2021-07-13 19:47:27,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:27,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:27,416 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:27,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4318 [2021-07-13 19:47:27,616 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:27,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:27,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1769925290, now seen corresponding path program 348 times [2021-07-13 19:47:27,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:27,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081675800] [2021-07-13 19:47:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:27,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:27,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081675800] [2021-07-13 19:47:27,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081675800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:27,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171055181] [2021-07-13 19:47:27,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:27,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:27,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171055181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435040147] [2021-07-13 19:47:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:27,928 INFO L87 Difference]: Start difference. First operand 858 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:28,491 INFO L93 Difference]: Finished difference Result 1288 states and 4009 transitions. [2021-07-13 19:47:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:28,493 INFO L225 Difference]: With dead ends: 1288 [2021-07-13 19:47:28,493 INFO L226 Difference]: Without dead ends: 1281 [2021-07-13 19:47:28,494 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-07-13 19:47:28,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 866. [2021-07-13 19:47:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.446242774566474) internal successors, (2981), 865 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2981 transitions. [2021-07-13 19:47:28,507 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2981 transitions. Word has length 20 [2021-07-13 19:47:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:28,507 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2981 transitions. [2021-07-13 19:47:28,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2981 transitions. [2021-07-13 19:47:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:28,508 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:28,508 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:28,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4323,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:28,709 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -275513052, now seen corresponding path program 349 times [2021-07-13 19:47:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:28,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828497223] [2021-07-13 19:47:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:28,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828497223] [2021-07-13 19:47:28,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828497223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:28,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584116677] [2021-07-13 19:47:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:28,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:29,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584116677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:29,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:29,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178889298] [2021-07-13 19:47:29,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:29,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:29,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:29,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:29,078 INFO L87 Difference]: Start difference. First operand 866 states and 2981 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:29,845 INFO L93 Difference]: Finished difference Result 1236 states and 3906 transitions. [2021-07-13 19:47:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:29,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:29,847 INFO L225 Difference]: With dead ends: 1236 [2021-07-13 19:47:29,847 INFO L226 Difference]: Without dead ends: 1236 [2021-07-13 19:47:29,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-07-13 19:47:29,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 870. [2021-07-13 19:47:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4533947065592634) internal successors, (3001), 869 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 3001 transitions. [2021-07-13 19:47:29,860 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 3001 transitions. Word has length 20 [2021-07-13 19:47:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:29,860 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 3001 transitions. [2021-07-13 19:47:29,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 3001 transitions. [2021-07-13 19:47:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:29,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:29,861 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:30,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4332 [2021-07-13 19:47:30,061 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:30,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1769420774, now seen corresponding path program 350 times [2021-07-13 19:47:30,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:30,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379507273] [2021-07-13 19:47:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:30,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379507273] [2021-07-13 19:47:30,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379507273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:30,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715849774] [2021-07-13 19:47:30,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:30,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:30,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:30,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715849774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:30,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:30,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:30,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187923810] [2021-07-13 19:47:30,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:30,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:30,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:30,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:30,383 INFO L87 Difference]: Start difference. First operand 870 states and 3001 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:31,183 INFO L93 Difference]: Finished difference Result 1284 states and 4006 transitions. [2021-07-13 19:47:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:47:31,183 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:31,185 INFO L225 Difference]: With dead ends: 1284 [2021-07-13 19:47:31,185 INFO L226 Difference]: Without dead ends: 1278 [2021-07-13 19:47:31,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 768.4ms TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2021-07-13 19:47:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 876. [2021-07-13 19:47:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.4411428571428573) internal successors, (3011), 875 states have internal predecessors, (3011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 3011 transitions. [2021-07-13 19:47:31,197 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 3011 transitions. Word has length 20 [2021-07-13 19:47:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:31,197 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 3011 transitions. [2021-07-13 19:47:31,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 3011 transitions. [2021-07-13 19:47:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:31,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:31,199 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:31,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4345,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:31,399 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:31,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1084603688, now seen corresponding path program 351 times [2021-07-13 19:47:31,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:31,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080913715] [2021-07-13 19:47:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:31,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:31,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080913715] [2021-07-13 19:47:31,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080913715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:31,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508166397] [2021-07-13 19:47:31,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:31,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:31,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508166397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:31,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:31,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:31,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244002573] [2021-07-13 19:47:31,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:31,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:31,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:31,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:31,698 INFO L87 Difference]: Start difference. First operand 876 states and 3011 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:32,494 INFO L93 Difference]: Finished difference Result 1326 states and 4093 transitions. [2021-07-13 19:47:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:47:32,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:32,497 INFO L225 Difference]: With dead ends: 1326 [2021-07-13 19:47:32,497 INFO L226 Difference]: Without dead ends: 1326 [2021-07-13 19:47:32,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:32,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-13 19:47:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 870. [2021-07-13 19:47:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.4395857307249713) internal successors, (2989), 869 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2989 transitions. [2021-07-13 19:47:32,510 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2989 transitions. Word has length 20 [2021-07-13 19:47:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:32,510 INFO L482 AbstractCegarLoop]: Abstraction has 870 states and 2989 transitions. [2021-07-13 19:47:32,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:32,510 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2989 transitions. [2021-07-13 19:47:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:32,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:32,511 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:32,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4353 [2021-07-13 19:47:32,712 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1339905262, now seen corresponding path program 352 times [2021-07-13 19:47:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:32,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137089837] [2021-07-13 19:47:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:32,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:32,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137089837] [2021-07-13 19:47:32,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137089837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:32,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200339805] [2021-07-13 19:47:32,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:32,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:32,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:33,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200339805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:33,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:33,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:33,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038292803] [2021-07-13 19:47:33,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:33,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:33,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:33,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:33,007 INFO L87 Difference]: Start difference. First operand 870 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:33,580 INFO L93 Difference]: Finished difference Result 1196 states and 3793 transitions. [2021-07-13 19:47:33,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:33,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:33,582 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 19:47:33,582 INFO L226 Difference]: Without dead ends: 1189 [2021-07-13 19:47:33,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:33,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-07-13 19:47:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 874. [2021-07-13 19:47:33,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4421534936998857) internal successors, (3005), 873 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3005 transitions. [2021-07-13 19:47:33,594 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3005 transitions. Word has length 20 [2021-07-13 19:47:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:33,594 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3005 transitions. [2021-07-13 19:47:33,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3005 transitions. [2021-07-13 19:47:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:33,596 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:33,596 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:33,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4361 [2021-07-13 19:47:33,796 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:33,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash -587159210, now seen corresponding path program 353 times [2021-07-13 19:47:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:33,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827036511] [2021-07-13 19:47:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:33,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827036511] [2021-07-13 19:47:33,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827036511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220920517] [2021-07-13 19:47:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:33,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:34,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220920517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:34,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:34,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:34,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178291385] [2021-07-13 19:47:34,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:34,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:34,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:34,120 INFO L87 Difference]: Start difference. First operand 874 states and 3005 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:34,895 INFO L93 Difference]: Finished difference Result 1142 states and 3672 transitions. [2021-07-13 19:47:34,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:34,897 INFO L225 Difference]: With dead ends: 1142 [2021-07-13 19:47:34,897 INFO L226 Difference]: Without dead ends: 1142 [2021-07-13 19:47:34,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 721.5ms TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:47:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2021-07-13 19:47:34,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 872. [2021-07-13 19:47:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.442020665901263) internal successors, (2998), 871 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2998 transitions. [2021-07-13 19:47:34,908 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2998 transitions. Word has length 20 [2021-07-13 19:47:34,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:34,908 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2998 transitions. [2021-07-13 19:47:34,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2998 transitions. [2021-07-13 19:47:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:34,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:34,909 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:35,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4369,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,110 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 475887386, now seen corresponding path program 354 times [2021-07-13 19:47:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:35,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322063490] [2021-07-13 19:47:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:35,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322063490] [2021-07-13 19:47:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322063490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045551344] [2021-07-13 19:47:35,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:35,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:35,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045551344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:35,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:35,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128562433] [2021-07-13 19:47:35,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:35,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:35,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:35,444 INFO L87 Difference]: Start difference. First operand 872 states and 2998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:36,071 INFO L93 Difference]: Finished difference Result 1141 states and 3674 transitions. [2021-07-13 19:47:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:36,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:36,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:36,073 INFO L225 Difference]: With dead ends: 1141 [2021-07-13 19:47:36,073 INFO L226 Difference]: Without dead ends: 1141 [2021-07-13 19:47:36,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 587.4ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-07-13 19:47:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 863. [2021-07-13 19:47:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4466357308584685) internal successors, (2971), 862 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2971 transitions. [2021-07-13 19:47:36,085 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2971 transitions. Word has length 20 [2021-07-13 19:47:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:36,085 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2971 transitions. [2021-07-13 19:47:36,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2971 transitions. [2021-07-13 19:47:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:36,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:36,086 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:36,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4376 [2021-07-13 19:47:36,287 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:36,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:36,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1768229786, now seen corresponding path program 355 times [2021-07-13 19:47:36,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:36,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830590087] [2021-07-13 19:47:36,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:36,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830590087] [2021-07-13 19:47:36,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830590087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:36,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370760061] [2021-07-13 19:47:36,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:36,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:36,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370760061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:36,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:36,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447133953] [2021-07-13 19:47:36,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:36,639 INFO L87 Difference]: Start difference. First operand 863 states and 2971 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:37,263 INFO L93 Difference]: Finished difference Result 1127 states and 3637 transitions. [2021-07-13 19:47:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:37,265 INFO L225 Difference]: With dead ends: 1127 [2021-07-13 19:47:37,265 INFO L226 Difference]: Without dead ends: 1127 [2021-07-13 19:47:37,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-07-13 19:47:37,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 862. [2021-07-13 19:47:37,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-07-13 19:47:37,277 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-07-13 19:47:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:37,277 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-07-13 19:47:37,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:37,277 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-07-13 19:47:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:37,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:37,278 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:37,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4388,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:37,479 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash 496623914, now seen corresponding path program 356 times [2021-07-13 19:47:37,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:37,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117032794] [2021-07-13 19:47:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117032794] [2021-07-13 19:47:37,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117032794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235911081] [2021-07-13 19:47:37,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:37,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:37,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:37,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:37,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235911081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:37,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:37,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:37,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433550801] [2021-07-13 19:47:37,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:37,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:37,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:37,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:37,804 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:38,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:38,657 INFO L93 Difference]: Finished difference Result 1223 states and 3852 transitions. [2021-07-13 19:47:38,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:47:38,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:38,659 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 19:47:38,660 INFO L226 Difference]: Without dead ends: 1217 [2021-07-13 19:47:38,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 767.6ms TimeCoverageRelationStatistics Valid=181, Invalid=575, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:38,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-07-13 19:47:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 872. [2021-07-13 19:47:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.4374282433983927) internal successors, (2994), 871 states have internal predecessors, (2994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2994 transitions. [2021-07-13 19:47:38,671 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2994 transitions. Word has length 20 [2021-07-13 19:47:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:38,672 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2994 transitions. [2021-07-13 19:47:38,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2994 transitions. [2021-07-13 19:47:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:38,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:38,673 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:38,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4401,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:38,875 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1418800012, now seen corresponding path program 357 times [2021-07-13 19:47:38,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:38,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771457680] [2021-07-13 19:47:38,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:38,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:38,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771457680] [2021-07-13 19:47:38,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771457680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:38,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822900536] [2021-07-13 19:47:38,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:39,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:47:39,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:39,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:39,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:39,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822900536] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:39,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:39,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:39,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536849117] [2021-07-13 19:47:39,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:39,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:39,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:39,212 INFO L87 Difference]: Start difference. First operand 872 states and 2994 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:39,986 INFO L93 Difference]: Finished difference Result 1145 states and 3682 transitions. [2021-07-13 19:47:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:39,988 INFO L225 Difference]: With dead ends: 1145 [2021-07-13 19:47:39,988 INFO L226 Difference]: Without dead ends: 1145 [2021-07-13 19:47:39,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-13 19:47:39,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 862. [2021-07-13 19:47:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-07-13 19:47:39,999 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-07-13 19:47:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:40,000 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-07-13 19:47:40,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:40,000 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-07-13 19:47:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:40,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:40,001 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:40,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4412,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:40,205 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash 992218262, now seen corresponding path program 358 times [2021-07-13 19:47:40,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:40,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962460111] [2021-07-13 19:47:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:40,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:40,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962460111] [2021-07-13 19:47:40,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962460111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:40,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906261689] [2021-07-13 19:47:40,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:40,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:40,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:40,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906261689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:40,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:40,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:40,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223198327] [2021-07-13 19:47:40,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:40,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:40,505 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:41,209 INFO L93 Difference]: Finished difference Result 1172 states and 3759 transitions. [2021-07-13 19:47:41,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:41,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:41,211 INFO L225 Difference]: With dead ends: 1172 [2021-07-13 19:47:41,211 INFO L226 Difference]: Without dead ends: 1172 [2021-07-13 19:47:41,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:41,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-07-13 19:47:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 865. [2021-07-13 19:47:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.449074074074074) internal successors, (2980), 864 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2980 transitions. [2021-07-13 19:47:41,222 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2980 transitions. Word has length 20 [2021-07-13 19:47:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:41,223 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2980 transitions. [2021-07-13 19:47:41,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2980 transitions. [2021-07-13 19:47:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:41,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:41,224 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:41,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-07-13 19:47:41,424 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1678411266, now seen corresponding path program 359 times [2021-07-13 19:47:41,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:41,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866922532] [2021-07-13 19:47:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:41,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866922532] [2021-07-13 19:47:41,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866922532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:41,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084344016] [2021-07-13 19:47:41,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:41,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:41,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:41,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:41,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:41,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084344016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:41,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:41,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:41,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17745373] [2021-07-13 19:47:41,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:41,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:41,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:41,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:41,747 INFO L87 Difference]: Start difference. First operand 865 states and 2980 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:42,493 INFO L93 Difference]: Finished difference Result 1136 states and 3679 transitions. [2021-07-13 19:47:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:42,495 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 19:47:42,495 INFO L226 Difference]: Without dead ends: 1136 [2021-07-13 19:47:42,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 696.8ms TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:47:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-07-13 19:47:42,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 862. [2021-07-13 19:47:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-07-13 19:47:42,506 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-07-13 19:47:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:42,506 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-07-13 19:47:42,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-07-13 19:47:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:42,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:42,507 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:42,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-07-13 19:47:42,708 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1522233702, now seen corresponding path program 360 times [2021-07-13 19:47:42,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:42,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492449394] [2021-07-13 19:47:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:42,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492449394] [2021-07-13 19:47:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492449394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062677470] [2021-07-13 19:47:42,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:42,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:47:42,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:42,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:42,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062677470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:43,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:43,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443267912] [2021-07-13 19:47:43,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:43,073 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:43,655 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-13 19:47:43,793 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-07-13 19:47:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:43,969 INFO L93 Difference]: Finished difference Result 1088 states and 3528 transitions. [2021-07-13 19:47:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:47:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:43,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:43,971 INFO L225 Difference]: With dead ends: 1088 [2021-07-13 19:47:43,971 INFO L226 Difference]: Without dead ends: 1076 [2021-07-13 19:47:43,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:43,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2021-07-13 19:47:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 864. [2021-07-13 19:47:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.443800695249131) internal successors, (2972), 863 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2972 transitions. [2021-07-13 19:47:43,982 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2972 transitions. Word has length 20 [2021-07-13 19:47:43,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:43,982 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2972 transitions. [2021-07-13 19:47:43,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:43,982 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2972 transitions. [2021-07-13 19:47:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:43,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:43,983 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:44,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4436,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:44,184 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:44,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:44,184 INFO L82 PathProgramCache]: Analyzing trace with hash -770833264, now seen corresponding path program 361 times [2021-07-13 19:47:44,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:44,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271225285] [2021-07-13 19:47:44,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:44,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271225285] [2021-07-13 19:47:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271225285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:44,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060380524] [2021-07-13 19:47:44,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:44,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:44,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060380524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:44,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:44,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:44,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547168891] [2021-07-13 19:47:44,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:44,505 INFO L87 Difference]: Start difference. First operand 864 states and 2972 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:45,326 INFO L93 Difference]: Finished difference Result 1117 states and 3590 transitions. [2021-07-13 19:47:45,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:45,328 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:47:45,328 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:47:45,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 759.1ms TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:47:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 874. [2021-07-13 19:47:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 873 states have (on average 3.4375715922107677) internal successors, (3001), 873 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 3001 transitions. [2021-07-13 19:47:45,339 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 3001 transitions. Word has length 20 [2021-07-13 19:47:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:45,339 INFO L482 AbstractCegarLoop]: Abstraction has 874 states and 3001 transitions. [2021-07-13 19:47:45,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 3001 transitions. [2021-07-13 19:47:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:45,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:45,340 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:45,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4444 [2021-07-13 19:47:45,541 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:45,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1608710106, now seen corresponding path program 362 times [2021-07-13 19:47:45,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:45,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539708791] [2021-07-13 19:47:45,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539708791] [2021-07-13 19:47:45,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539708791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074754232] [2021-07-13 19:47:45,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:45,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:45,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:45,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:45,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074754232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:45,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:45,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:45,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047222472] [2021-07-13 19:47:45,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:45,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:45,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:45,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:45,866 INFO L87 Difference]: Start difference. First operand 874 states and 3001 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:46,555 INFO L93 Difference]: Finished difference Result 1029 states and 3397 transitions. [2021-07-13 19:47:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:47:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:46,557 INFO L225 Difference]: With dead ends: 1029 [2021-07-13 19:47:46,557 INFO L226 Difference]: Without dead ends: 1029 [2021-07-13 19:47:46,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-07-13 19:47:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 862. [2021-07-13 19:47:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.443670150987224) internal successors, (2965), 861 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2965 transitions. [2021-07-13 19:47:46,568 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2965 transitions. Word has length 20 [2021-07-13 19:47:46,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:46,568 INFO L482 AbstractCegarLoop]: Abstraction has 862 states and 2965 transitions. [2021-07-13 19:47:46,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:46,568 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2965 transitions. [2021-07-13 19:47:46,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:46,569 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:46,569 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:46,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4452 [2021-07-13 19:47:46,769 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1449125080, now seen corresponding path program 363 times [2021-07-13 19:47:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:46,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108693006] [2021-07-13 19:47:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:46,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:46,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108693006] [2021-07-13 19:47:46,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108693006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:46,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798139703] [2021-07-13 19:47:46,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:46,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:47:46,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:46,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:47,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798139703] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:47,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:47,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:47,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342235913] [2021-07-13 19:47:47,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:47,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:47,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:47,094 INFO L87 Difference]: Start difference. First operand 862 states and 2965 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:47,578 INFO L93 Difference]: Finished difference Result 1071 states and 3508 transitions. [2021-07-13 19:47:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:47,580 INFO L225 Difference]: With dead ends: 1071 [2021-07-13 19:47:47,580 INFO L226 Difference]: Without dead ends: 1071 [2021-07-13 19:47:47,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2021-07-13 19:47:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 861. [2021-07-13 19:47:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 3.4453488372093024) internal successors, (2963), 860 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2963 transitions. [2021-07-13 19:47:47,591 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2963 transitions. Word has length 20 [2021-07-13 19:47:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:47,591 INFO L482 AbstractCegarLoop]: Abstraction has 861 states and 2963 transitions. [2021-07-13 19:47:47,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2963 transitions. [2021-07-13 19:47:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:47,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:47,592 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:47,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4460 [2021-07-13 19:47:47,793 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -697724642, now seen corresponding path program 364 times [2021-07-13 19:47:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:47,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911179460] [2021-07-13 19:47:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:47,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:47,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911179460] [2021-07-13 19:47:47,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911179460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:47,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059567453] [2021-07-13 19:47:47,862 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:47,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:47,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059567453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:48,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:48,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978579952] [2021-07-13 19:47:48,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:48,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:48,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:48,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:48,093 INFO L87 Difference]: Start difference. First operand 861 states and 2963 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:48,638 INFO L93 Difference]: Finished difference Result 1091 states and 3547 transitions. [2021-07-13 19:47:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:48,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:48,640 INFO L225 Difference]: With dead ends: 1091 [2021-07-13 19:47:48,640 INFO L226 Difference]: Without dead ends: 1091 [2021-07-13 19:47:48,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 505.8ms TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:47:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-07-13 19:47:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 860. [2021-07-13 19:47:48,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-07-13 19:47:48,651 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-07-13 19:47:48,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:48,651 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-07-13 19:47:48,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:48,651 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-07-13 19:47:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:48,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:48,652 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:48,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4465,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:48,853 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash 926613126, now seen corresponding path program 365 times [2021-07-13 19:47:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:48,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738751952] [2021-07-13 19:47:48,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:48,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:48,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:48,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738751952] [2021-07-13 19:47:48,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738751952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:48,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429532725] [2021-07-13 19:47:48,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:49,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:49,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:49,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:49,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:49,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429532725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:49,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:49,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:47:49,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897869319] [2021-07-13 19:47:49,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:47:49,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:49,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:47:49,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:47:49,162 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:49,705 INFO L93 Difference]: Finished difference Result 1049 states and 3452 transitions. [2021-07-13 19:47:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:49,707 INFO L225 Difference]: With dead ends: 1049 [2021-07-13 19:47:49,707 INFO L226 Difference]: Without dead ends: 1049 [2021-07-13 19:47:49,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 501.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:49,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2021-07-13 19:47:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 845. [2021-07-13 19:47:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.440758293838863) internal successors, (2904), 844 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2904 transitions. [2021-07-13 19:47:49,724 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2904 transitions. Word has length 20 [2021-07-13 19:47:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:49,724 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2904 transitions. [2021-07-13 19:47:49,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2904 transitions. [2021-07-13 19:47:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:49,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:49,726 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:49,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4472 [2021-07-13 19:47:49,926 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:49,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 501257584, now seen corresponding path program 366 times [2021-07-13 19:47:49,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:49,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805550846] [2021-07-13 19:47:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:49,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805550846] [2021-07-13 19:47:49,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805550846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:49,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8432475] [2021-07-13 19:47:49,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:50,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:50,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:50,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8432475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:50,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:50,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:47:50,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058633990] [2021-07-13 19:47:50,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:50,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:50,201 INFO L87 Difference]: Start difference. First operand 845 states and 2904 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:51,210 INFO L93 Difference]: Finished difference Result 1468 states and 4547 transitions. [2021-07-13 19:47:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:47:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:51,212 INFO L225 Difference]: With dead ends: 1468 [2021-07-13 19:47:51,212 INFO L226 Difference]: Without dead ends: 1468 [2021-07-13 19:47:51,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 939.5ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:47:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2021-07-13 19:47:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 852. [2021-07-13 19:47:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4512338425381905) internal successors, (2937), 851 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2937 transitions. [2021-07-13 19:47:51,226 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2937 transitions. Word has length 20 [2021-07-13 19:47:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:51,226 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2937 transitions. [2021-07-13 19:47:51,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2937 transitions. [2021-07-13 19:47:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:51,227 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:51,227 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:51,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4479,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:51,428 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1814911300, now seen corresponding path program 367 times [2021-07-13 19:47:51,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:51,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930439121] [2021-07-13 19:47:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:51,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:51,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930439121] [2021-07-13 19:47:51,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930439121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:51,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210301630] [2021-07-13 19:47:51,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:51,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:51,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210301630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:51,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:51,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018066101] [2021-07-13 19:47:51,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:51,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:51,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:51,776 INFO L87 Difference]: Start difference. First operand 852 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:52,308 INFO L93 Difference]: Finished difference Result 1191 states and 3856 transitions. [2021-07-13 19:47:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:47:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:52,310 INFO L225 Difference]: With dead ends: 1191 [2021-07-13 19:47:52,310 INFO L226 Difference]: Without dead ends: 1179 [2021-07-13 19:47:52,310 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 592.6ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:47:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2021-07-13 19:47:52,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 852. [2021-07-13 19:47:52,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.4477085781433607) internal successors, (2934), 851 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2934 transitions. [2021-07-13 19:47:52,321 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2934 transitions. Word has length 20 [2021-07-13 19:47:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:52,321 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2934 transitions. [2021-07-13 19:47:52,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2934 transitions. [2021-07-13 19:47:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:52,322 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:52,322 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:52,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4486 [2021-07-13 19:47:52,523 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1644913176, now seen corresponding path program 368 times [2021-07-13 19:47:52,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:52,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422730262] [2021-07-13 19:47:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:52,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:52,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422730262] [2021-07-13 19:47:52,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422730262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897776825] [2021-07-13 19:47:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:52,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:52,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:52,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:52,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:52,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897776825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:52,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:52,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:47:52,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476635565] [2021-07-13 19:47:52,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:52,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:52,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:52,805 INFO L87 Difference]: Start difference. First operand 852 states and 2934 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:53,385 INFO L93 Difference]: Finished difference Result 1362 states and 4296 transitions. [2021-07-13 19:47:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:53,387 INFO L225 Difference]: With dead ends: 1362 [2021-07-13 19:47:53,387 INFO L226 Difference]: Without dead ends: 1362 [2021-07-13 19:47:53,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 541.2ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:47:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-07-13 19:47:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 849. [2021-07-13 19:47:53,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4504716981132075) internal successors, (2926), 848 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2926 transitions. [2021-07-13 19:47:53,400 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2926 transitions. Word has length 20 [2021-07-13 19:47:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:53,400 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2926 transitions. [2021-07-13 19:47:53,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2926 transitions. [2021-07-13 19:47:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:53,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:53,401 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:53,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4493 [2021-07-13 19:47:53,601 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1227165978, now seen corresponding path program 369 times [2021-07-13 19:47:53,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:53,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956933403] [2021-07-13 19:47:53,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:53,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:53,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956933403] [2021-07-13 19:47:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956933403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168504957] [2021-07-13 19:47:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:53,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:47:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:53,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:53,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168504957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:53,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:53,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:47:53,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950446157] [2021-07-13 19:47:53,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:47:53,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:53,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:47:53,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:47:53,905 INFO L87 Difference]: Start difference. First operand 849 states and 2926 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:54,408 INFO L93 Difference]: Finished difference Result 1223 states and 3916 transitions. [2021-07-13 19:47:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:47:54,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:54,410 INFO L225 Difference]: With dead ends: 1223 [2021-07-13 19:47:54,410 INFO L226 Difference]: Without dead ends: 1205 [2021-07-13 19:47:54,411 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:47:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-07-13 19:47:54,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 849. [2021-07-13 19:47:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.446933962264151) internal successors, (2923), 848 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2923 transitions. [2021-07-13 19:47:54,422 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2923 transitions. Word has length 20 [2021-07-13 19:47:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:54,422 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2923 transitions. [2021-07-13 19:47:54,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2923 transitions. [2021-07-13 19:47:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:54,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:54,423 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:54,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4497 [2021-07-13 19:47:54,623 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:54,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1637361588, now seen corresponding path program 370 times [2021-07-13 19:47:54,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:54,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144757284] [2021-07-13 19:47:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:54,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:54,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144757284] [2021-07-13 19:47:54,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144757284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:54,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285793548] [2021-07-13 19:47:54,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:54,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:47:54,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:54,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:54,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:54,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285793548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:54,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:54,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:47:54,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232149364] [2021-07-13 19:47:54,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:47:54,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:54,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:47:54,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:47:54,877 INFO L87 Difference]: Start difference. First operand 849 states and 2923 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:55,287 INFO L93 Difference]: Finished difference Result 1355 states and 4290 transitions. [2021-07-13 19:47:55,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:55,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:55,289 INFO L225 Difference]: With dead ends: 1355 [2021-07-13 19:47:55,289 INFO L226 Difference]: Without dead ends: 1355 [2021-07-13 19:47:55,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 369.5ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:47:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-07-13 19:47:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 846. [2021-07-13 19:47:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.4497041420118344) internal successors, (2915), 845 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2915 transitions. [2021-07-13 19:47:55,310 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2915 transitions. Word has length 20 [2021-07-13 19:47:55,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:55,310 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 2915 transitions. [2021-07-13 19:47:55,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2915 transitions. [2021-07-13 19:47:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:55,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:55,311 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:55,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4504 [2021-07-13 19:47:55,512 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash -99774376, now seen corresponding path program 371 times [2021-07-13 19:47:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:55,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552675780] [2021-07-13 19:47:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:55,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:55,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:55,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552675780] [2021-07-13 19:47:55,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552675780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:55,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555953635] [2021-07-13 19:47:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:55,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:47:55,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:55,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:55,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:55,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555953635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:55,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:55,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822729177] [2021-07-13 19:47:55,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:55,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:55,806 INFO L87 Difference]: Start difference. First operand 846 states and 2915 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:56,354 INFO L93 Difference]: Finished difference Result 1325 states and 4178 transitions. [2021-07-13 19:47:56,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:47:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:56,356 INFO L225 Difference]: With dead ends: 1325 [2021-07-13 19:47:56,356 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 19:47:56,356 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:47:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 19:47:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 860. [2021-07-13 19:47:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.4435389988358556) internal successors, (2958), 859 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2958 transitions. [2021-07-13 19:47:56,369 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2958 transitions. Word has length 20 [2021-07-13 19:47:56,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:56,369 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2958 transitions. [2021-07-13 19:47:56,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2958 transitions. [2021-07-13 19:47:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:56,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:56,370 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:56,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4509 [2021-07-13 19:47:56,570 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:56,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1961589942, now seen corresponding path program 372 times [2021-07-13 19:47:56,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:56,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284212566] [2021-07-13 19:47:56,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:56,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284212566] [2021-07-13 19:47:56,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284212566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355343261] [2021-07-13 19:47:56,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:56,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:47:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:56,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355343261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:56,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:56,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:56,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141194028] [2021-07-13 19:47:56,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:56,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:56,973 INFO L87 Difference]: Start difference. First operand 860 states and 2958 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:57,718 INFO L93 Difference]: Finished difference Result 1210 states and 3880 transitions. [2021-07-13 19:47:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:47:57,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:57,720 INFO L225 Difference]: With dead ends: 1210 [2021-07-13 19:47:57,720 INFO L226 Difference]: Without dead ends: 1210 [2021-07-13 19:47:57,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:47:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-07-13 19:47:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 857. [2021-07-13 19:47:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.439252336448598) internal successors, (2944), 856 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2944 transitions. [2021-07-13 19:47:57,732 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2944 transitions. Word has length 20 [2021-07-13 19:47:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:57,732 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2944 transitions. [2021-07-13 19:47:57,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2944 transitions. [2021-07-13 19:47:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:57,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:57,733 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:57,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4516,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:57,934 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:57,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:57,934 INFO L82 PathProgramCache]: Analyzing trace with hash -99269860, now seen corresponding path program 373 times [2021-07-13 19:47:57,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:57,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569291744] [2021-07-13 19:47:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:58,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569291744] [2021-07-13 19:47:58,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569291744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:58,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410077899] [2021-07-13 19:47:58,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410077899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:58,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:58,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976093769] [2021-07-13 19:47:58,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:58,299 INFO L87 Difference]: Start difference. First operand 857 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:47:59,227 INFO L93 Difference]: Finished difference Result 1264 states and 4001 transitions. [2021-07-13 19:47:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:47:59,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:47:59,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:47:59,229 INFO L225 Difference]: With dead ends: 1264 [2021-07-13 19:47:59,229 INFO L226 Difference]: Without dead ends: 1258 [2021-07-13 19:47:59,229 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 908.0ms TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:47:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-07-13 19:47:59,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 857. [2021-07-13 19:47:59,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.435747663551402) internal successors, (2941), 856 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2941 transitions. [2021-07-13 19:47:59,242 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2941 transitions. Word has length 20 [2021-07-13 19:47:59,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:47:59,242 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2941 transitions. [2021-07-13 19:47:59,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:47:59,242 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2941 transitions. [2021-07-13 19:47:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:47:59,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:47:59,243 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:47:59,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4527 [2021-07-13 19:47:59,444 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:47:59,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:47:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1540212694, now seen corresponding path program 374 times [2021-07-13 19:47:59,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:47:59,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205271414] [2021-07-13 19:47:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:47:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:47:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:59,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:47:59,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205271414] [2021-07-13 19:47:59,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205271414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:59,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891193479] [2021-07-13 19:47:59,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:47:59,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:47:59,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:47:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:47:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:47:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:47:59,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891193479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:47:59,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:47:59,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:47:59,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909387588] [2021-07-13 19:47:59,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:47:59,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:47:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:47:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:47:59,759 INFO L87 Difference]: Start difference. First operand 857 states and 2941 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:00,795 INFO L93 Difference]: Finished difference Result 1402 states and 4346 transitions. [2021-07-13 19:48:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:48:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:00,798 INFO L225 Difference]: With dead ends: 1402 [2021-07-13 19:48:00,798 INFO L226 Difference]: Without dead ends: 1402 [2021-07-13 19:48:00,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:48:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-07-13 19:48:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 854. [2021-07-13 19:48:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4384525205158263) internal successors, (2933), 853 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2933 transitions. [2021-07-13 19:48:00,811 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2933 transitions. Word has length 20 [2021-07-13 19:48:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:00,811 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2933 transitions. [2021-07-13 19:48:00,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2933 transitions. [2021-07-13 19:48:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:00,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:00,812 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:01,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4537,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:01,012 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:01,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:01,012 INFO L82 PathProgramCache]: Analyzing trace with hash 438585718, now seen corresponding path program 375 times [2021-07-13 19:48:01,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:01,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526562546] [2021-07-13 19:48:01,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:01,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:01,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526562546] [2021-07-13 19:48:01,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526562546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:01,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661199760] [2021-07-13 19:48:01,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:01,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:48:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:01,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:01,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661199760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:01,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:01,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703379044] [2021-07-13 19:48:01,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:01,368 INFO L87 Difference]: Start difference. First operand 854 states and 2933 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:02,062 INFO L93 Difference]: Finished difference Result 1186 states and 3820 transitions. [2021-07-13 19:48:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:02,064 INFO L225 Difference]: With dead ends: 1186 [2021-07-13 19:48:02,064 INFO L226 Difference]: Without dead ends: 1174 [2021-07-13 19:48:02,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:02,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-07-13 19:48:02,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 854. [2021-07-13 19:48:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4349355216881596) internal successors, (2930), 853 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2930 transitions. [2021-07-13 19:48:02,075 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2930 transitions. Word has length 20 [2021-07-13 19:48:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:02,075 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2930 transitions. [2021-07-13 19:48:02,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2930 transitions. [2021-07-13 19:48:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:02,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:02,076 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:02,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4543,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:02,277 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:02,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 608583842, now seen corresponding path program 376 times [2021-07-13 19:48:02,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:02,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683437463] [2021-07-13 19:48:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:02,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683437463] [2021-07-13 19:48:02,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683437463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:02,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395671785] [2021-07-13 19:48:02,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:02,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:02,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:02,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:02,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395671785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:02,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:02,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:02,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576434561] [2021-07-13 19:48:02,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:02,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:02,566 INFO L87 Difference]: Start difference. First operand 854 states and 2930 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:03,160 INFO L93 Difference]: Finished difference Result 1269 states and 4057 transitions. [2021-07-13 19:48:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:03,163 INFO L225 Difference]: With dead ends: 1269 [2021-07-13 19:48:03,163 INFO L226 Difference]: Without dead ends: 1269 [2021-07-13 19:48:03,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 541.5ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-07-13 19:48:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 851. [2021-07-13 19:48:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.4376470588235293) internal successors, (2922), 850 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2922 transitions. [2021-07-13 19:48:03,174 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2922 transitions. Word has length 20 [2021-07-13 19:48:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:03,174 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2922 transitions. [2021-07-13 19:48:03,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2922 transitions. [2021-07-13 19:48:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:03,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:03,176 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:03,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4550 [2021-07-13 19:48:03,376 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:03,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:03,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1718802722, now seen corresponding path program 377 times [2021-07-13 19:48:03,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:03,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310819304] [2021-07-13 19:48:03,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:03,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:03,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310819304] [2021-07-13 19:48:03,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310819304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:03,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984923001] [2021-07-13 19:48:03,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:03,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:03,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:03,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:03,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:03,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984923001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:03,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:03,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:03,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568016014] [2021-07-13 19:48:03,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:03,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:03,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:03,689 INFO L87 Difference]: Start difference. First operand 851 states and 2922 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:04,317 INFO L93 Difference]: Finished difference Result 1407 states and 4378 transitions. [2021-07-13 19:48:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:04,319 INFO L225 Difference]: With dead ends: 1407 [2021-07-13 19:48:04,319 INFO L226 Difference]: Without dead ends: 1400 [2021-07-13 19:48:04,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 601.7ms TimeCoverageRelationStatistics Valid=176, Invalid=474, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-13 19:48:04,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 859. [2021-07-13 19:48:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.448717948717949) internal successors, (2959), 858 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2959 transitions. [2021-07-13 19:48:04,333 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2959 transitions. Word has length 20 [2021-07-13 19:48:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:04,333 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 2959 transitions. [2021-07-13 19:48:04,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2959 transitions. [2021-07-13 19:48:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:04,334 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:04,334 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:04,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4555,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:04,535 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:04,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1081752336, now seen corresponding path program 378 times [2021-07-13 19:48:04,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:04,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268180599] [2021-07-13 19:48:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:04,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268180599] [2021-07-13 19:48:04,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268180599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:04,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287282584] [2021-07-13 19:48:04,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:04,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:04,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:04,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287282584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:04,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674799448] [2021-07-13 19:48:04,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:04,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:04,878 INFO L87 Difference]: Start difference. First operand 859 states and 2959 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:05,795 INFO L93 Difference]: Finished difference Result 1304 states and 4124 transitions. [2021-07-13 19:48:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:05,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:05,798 INFO L225 Difference]: With dead ends: 1304 [2021-07-13 19:48:05,798 INFO L226 Difference]: Without dead ends: 1304 [2021-07-13 19:48:05,798 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 911.1ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-07-13 19:48:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 863. [2021-07-13 19:48:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4559164733178656) internal successors, (2979), 862 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2979 transitions. [2021-07-13 19:48:05,810 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2979 transitions. Word has length 20 [2021-07-13 19:48:05,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:05,811 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2979 transitions. [2021-07-13 19:48:05,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:05,811 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2979 transitions. [2021-07-13 19:48:05,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:05,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:05,812 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:06,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4562 [2021-07-13 19:48:06,012 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:06,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1719307238, now seen corresponding path program 379 times [2021-07-13 19:48:06,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:06,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664610879] [2021-07-13 19:48:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:06,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:06,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664610879] [2021-07-13 19:48:06,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664610879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:06,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216253494] [2021-07-13 19:48:06,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:06,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:06,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216253494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:06,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:06,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343279140] [2021-07-13 19:48:06,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:06,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:06,360 INFO L87 Difference]: Start difference. First operand 863 states and 2979 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:07,470 INFO L93 Difference]: Finished difference Result 1358 states and 4239 transitions. [2021-07-13 19:48:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:48:07,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:07,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:07,473 INFO L225 Difference]: With dead ends: 1358 [2021-07-13 19:48:07,473 INFO L226 Difference]: Without dead ends: 1352 [2021-07-13 19:48:07,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1071.2ms TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-07-13 19:48:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 869. [2021-07-13 19:48:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.443548387096774) internal successors, (2989), 868 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2989 transitions. [2021-07-13 19:48:07,487 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2989 transitions. Word has length 20 [2021-07-13 19:48:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:07,487 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2989 transitions. [2021-07-13 19:48:07,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2989 transitions. [2021-07-13 19:48:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:07,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:07,488 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:07,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4577,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:07,688 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:07,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:07,689 INFO L82 PathProgramCache]: Analyzing trace with hash 278364404, now seen corresponding path program 380 times [2021-07-13 19:48:07,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:07,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074038598] [2021-07-13 19:48:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:07,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074038598] [2021-07-13 19:48:07,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074038598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:07,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094803177] [2021-07-13 19:48:07,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:07,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:07,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:07,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:07,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094803177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:07,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:07,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:07,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112723363] [2021-07-13 19:48:07,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:07,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:07,986 INFO L87 Difference]: Start difference. First operand 869 states and 2989 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:08,873 INFO L93 Difference]: Finished difference Result 1431 states and 4427 transitions. [2021-07-13 19:48:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:08,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:08,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:08,876 INFO L225 Difference]: With dead ends: 1431 [2021-07-13 19:48:08,876 INFO L226 Difference]: Without dead ends: 1431 [2021-07-13 19:48:08,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=197, Invalid=615, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:08,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-07-13 19:48:08,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 863. [2021-07-13 19:48:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.4419953596287702) internal successors, (2967), 862 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2967 transitions. [2021-07-13 19:48:08,889 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2967 transitions. Word has length 20 [2021-07-13 19:48:08,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:08,889 INFO L482 AbstractCegarLoop]: Abstraction has 863 states and 2967 transitions. [2021-07-13 19:48:08,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2967 transitions. [2021-07-13 19:48:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:08,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:08,890 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:09,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4589,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:09,091 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:09,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 533665978, now seen corresponding path program 381 times [2021-07-13 19:48:09,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:09,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96128270] [2021-07-13 19:48:09,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:09,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:09,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96128270] [2021-07-13 19:48:09,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96128270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:09,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492834540] [2021-07-13 19:48:09,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:09,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:09,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:09,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:09,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492834540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:09,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:09,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:09,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683531631] [2021-07-13 19:48:09,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:09,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:09,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:09,420 INFO L87 Difference]: Start difference. First operand 863 states and 2967 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:10,036 INFO L93 Difference]: Finished difference Result 1315 states and 4162 transitions. [2021-07-13 19:48:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:10,038 INFO L225 Difference]: With dead ends: 1315 [2021-07-13 19:48:10,038 INFO L226 Difference]: Without dead ends: 1308 [2021-07-13 19:48:10,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 609.6ms TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-07-13 19:48:10,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 867. [2021-07-13 19:48:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.4422632794457275) internal successors, (2981), 866 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2981 transitions. [2021-07-13 19:48:10,051 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2981 transitions. Word has length 20 [2021-07-13 19:48:10,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:10,051 INFO L482 AbstractCegarLoop]: Abstraction has 867 states and 2981 transitions. [2021-07-13 19:48:10,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:10,051 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2981 transitions. [2021-07-13 19:48:10,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:10,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:10,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:10,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4597,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:10,253 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:10,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1393398494, now seen corresponding path program 382 times [2021-07-13 19:48:10,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:10,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049342674] [2021-07-13 19:48:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:10,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:10,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049342674] [2021-07-13 19:48:10,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049342674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:10,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164031751] [2021-07-13 19:48:10,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:10,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:10,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:10,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164031751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:10,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:10,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:10,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118099644] [2021-07-13 19:48:10,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:10,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:10,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:10,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:10,579 INFO L87 Difference]: Start difference. First operand 867 states and 2981 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:11,456 INFO L93 Difference]: Finished difference Result 1285 states and 4089 transitions. [2021-07-13 19:48:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:11,458 INFO L225 Difference]: With dead ends: 1285 [2021-07-13 19:48:11,458 INFO L226 Difference]: Without dead ends: 1285 [2021-07-13 19:48:11,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 831.7ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:48:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-07-13 19:48:11,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 865. [2021-07-13 19:48:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.4444444444444446) internal successors, (2976), 864 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2976 transitions. [2021-07-13 19:48:11,471 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2976 transitions. Word has length 20 [2021-07-13 19:48:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:11,471 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2976 transitions. [2021-07-13 19:48:11,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2976 transitions. [2021-07-13 19:48:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:11,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:11,472 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:11,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4606,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:11,673 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:11,673 INFO L82 PathProgramCache]: Analyzing trace with hash -330351898, now seen corresponding path program 383 times [2021-07-13 19:48:11,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:11,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423923265] [2021-07-13 19:48:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:11,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423923265] [2021-07-13 19:48:11,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423923265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:11,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757086175] [2021-07-13 19:48:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:11,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:11,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:11,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:11,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757086175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823989142] [2021-07-13 19:48:12,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:12,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:12,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:12,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:12,131 INFO L87 Difference]: Start difference. First operand 865 states and 2976 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:12,587 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-07-13 19:48:12,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:12,896 INFO L93 Difference]: Finished difference Result 1222 states and 3924 transitions. [2021-07-13 19:48:12,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:12,896 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:12,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:12,898 INFO L225 Difference]: With dead ends: 1222 [2021-07-13 19:48:12,898 INFO L226 Difference]: Without dead ends: 1222 [2021-07-13 19:48:12,898 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 843.4ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:12,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-07-13 19:48:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 856. [2021-07-13 19:48:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.449122807017544) internal successors, (2949), 855 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2949 transitions. [2021-07-13 19:48:12,910 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2949 transitions. Word has length 20 [2021-07-13 19:48:12,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:12,910 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2949 transitions. [2021-07-13 19:48:12,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:12,910 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2949 transitions. [2021-07-13 19:48:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:12,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:12,911 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:13,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4613 [2021-07-13 19:48:13,112 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash 961990502, now seen corresponding path program 384 times [2021-07-13 19:48:13,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:13,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847473050] [2021-07-13 19:48:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:13,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:13,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847473050] [2021-07-13 19:48:13,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847473050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:13,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956807662] [2021-07-13 19:48:13,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:13,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:13,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:13,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956807662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:13,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:13,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:13,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797153281] [2021-07-13 19:48:13,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:13,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:13,494 INFO L87 Difference]: Start difference. First operand 856 states and 2949 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:14,241 INFO L93 Difference]: Finished difference Result 1185 states and 3842 transitions. [2021-07-13 19:48:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:14,241 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:14,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:14,243 INFO L225 Difference]: With dead ends: 1185 [2021-07-13 19:48:14,243 INFO L226 Difference]: Without dead ends: 1185 [2021-07-13 19:48:14,243 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-07-13 19:48:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 855. [2021-07-13 19:48:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-07-13 19:48:14,255 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-07-13 19:48:14,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:14,255 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-07-13 19:48:14,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-07-13 19:48:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:14,256 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:14,256 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:14,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4626,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,456 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash -309615370, now seen corresponding path program 385 times [2021-07-13 19:48:14,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:14,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197007917] [2021-07-13 19:48:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:14,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197007917] [2021-07-13 19:48:14,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197007917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:14,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302130909] [2021-07-13 19:48:14,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:14,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:14,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302130909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:14,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:14,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976495008] [2021-07-13 19:48:14,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:14,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:14,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:14,790 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:15,839 INFO L93 Difference]: Finished difference Result 1274 states and 4040 transitions. [2021-07-13 19:48:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:15,840 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:15,842 INFO L225 Difference]: With dead ends: 1274 [2021-07-13 19:48:15,842 INFO L226 Difference]: Without dead ends: 1268 [2021-07-13 19:48:15,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1000.1ms TimeCoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:15,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-07-13 19:48:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 865. [2021-07-13 19:48:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 864 states have (on average 3.439814814814815) internal successors, (2972), 864 states have internal predecessors, (2972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 2972 transitions. [2021-07-13 19:48:15,854 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 2972 transitions. Word has length 20 [2021-07-13 19:48:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:15,854 INFO L482 AbstractCegarLoop]: Abstraction has 865 states and 2972 transitions. [2021-07-13 19:48:15,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 2972 transitions. [2021-07-13 19:48:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:15,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:15,855 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:16,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4633 [2021-07-13 19:48:16,056 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:16,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash 2069928000, now seen corresponding path program 386 times [2021-07-13 19:48:16,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:16,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707881860] [2021-07-13 19:48:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:16,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:16,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707881860] [2021-07-13 19:48:16,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707881860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:16,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445234857] [2021-07-13 19:48:16,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:16,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:16,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:16,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:16,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445234857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:16,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:16,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:16,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979506403] [2021-07-13 19:48:16,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:16,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:16,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:16,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:16,411 INFO L87 Difference]: Start difference. First operand 865 states and 2972 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:17,371 INFO L93 Difference]: Finished difference Result 1209 states and 3902 transitions. [2021-07-13 19:48:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:17,373 INFO L225 Difference]: With dead ends: 1209 [2021-07-13 19:48:17,373 INFO L226 Difference]: Without dead ends: 1209 [2021-07-13 19:48:17,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 943.5ms TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:17,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-07-13 19:48:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 855. [2021-07-13 19:48:17,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 3.446135831381733) internal successors, (2943), 854 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 2943 transitions. [2021-07-13 19:48:17,385 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 2943 transitions. Word has length 20 [2021-07-13 19:48:17,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:17,385 INFO L482 AbstractCegarLoop]: Abstraction has 855 states and 2943 transitions. [2021-07-13 19:48:17,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:17,385 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 2943 transitions. [2021-07-13 19:48:17,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:17,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:17,386 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:17,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4643,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:17,586 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash 185978978, now seen corresponding path program 387 times [2021-07-13 19:48:17,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:17,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032128448] [2021-07-13 19:48:17,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:17,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:17,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032128448] [2021-07-13 19:48:17,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032128448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:17,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186414397] [2021-07-13 19:48:17,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:17,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:17,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:17,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:17,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:17,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186414397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:17,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:17,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:17,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641405101] [2021-07-13 19:48:17,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:17,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:17,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:17,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:17,891 INFO L87 Difference]: Start difference. First operand 855 states and 2943 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:18,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:18,713 INFO L93 Difference]: Finished difference Result 1313 states and 4171 transitions. [2021-07-13 19:48:18,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:18,713 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:18,715 INFO L225 Difference]: With dead ends: 1313 [2021-07-13 19:48:18,715 INFO L226 Difference]: Without dead ends: 1313 [2021-07-13 19:48:18,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 752.4ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-13 19:48:18,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 858. [2021-07-13 19:48:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.4515752625437575) internal successors, (2958), 857 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:18,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2958 transitions. [2021-07-13 19:48:18,728 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2958 transitions. Word has length 20 [2021-07-13 19:48:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:18,728 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2958 transitions. [2021-07-13 19:48:18,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2958 transitions. [2021-07-13 19:48:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:18,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:18,729 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:18,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4654,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:18,930 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:18,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:18,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1810316746, now seen corresponding path program 388 times [2021-07-13 19:48:18,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:18,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333324655] [2021-07-13 19:48:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:19,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333324655] [2021-07-13 19:48:19,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333324655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:19,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725236869] [2021-07-13 19:48:19,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:19,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:19,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725236869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:19,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:19,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:19,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035174921] [2021-07-13 19:48:19,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:19,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:19,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:19,242 INFO L87 Difference]: Start difference. First operand 858 states and 2958 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:20,036 INFO L93 Difference]: Finished difference Result 1277 states and 4091 transitions. [2021-07-13 19:48:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:20,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:20,038 INFO L225 Difference]: With dead ends: 1277 [2021-07-13 19:48:20,038 INFO L226 Difference]: Without dead ends: 1277 [2021-07-13 19:48:20,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 753.6ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:48:20,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-07-13 19:48:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 854. [2021-07-13 19:48:20,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-07-13 19:48:20,051 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-07-13 19:48:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:20,051 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-07-13 19:48:20,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-07-13 19:48:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:20,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:20,052 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:20,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4662 [2021-07-13 19:48:20,252 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1966494310, now seen corresponding path program 389 times [2021-07-13 19:48:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:20,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912713089] [2021-07-13 19:48:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:20,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912713089] [2021-07-13 19:48:20,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912713089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:20,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752646974] [2021-07-13 19:48:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:20,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:20,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:20,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:20,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752646974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:20,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:20,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:20,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683154198] [2021-07-13 19:48:20,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:20,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:20,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:20,589 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:21,381 INFO L93 Difference]: Finished difference Result 1185 states and 3822 transitions. [2021-07-13 19:48:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:21,383 INFO L225 Difference]: With dead ends: 1185 [2021-07-13 19:48:21,383 INFO L226 Difference]: Without dead ends: 1173 [2021-07-13 19:48:21,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 792.5ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-07-13 19:48:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 856. [2021-07-13 19:48:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.4432748538011695) internal successors, (2944), 855 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2944 transitions. [2021-07-13 19:48:21,394 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2944 transitions. Word has length 20 [2021-07-13 19:48:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:21,394 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2944 transitions. [2021-07-13 19:48:21,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2944 transitions. [2021-07-13 19:48:21,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:21,395 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:21,395 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4671,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:21,596 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:21,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1577072548, now seen corresponding path program 390 times [2021-07-13 19:48:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:21,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230606987] [2021-07-13 19:48:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:21,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:21,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:21,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230606987] [2021-07-13 19:48:21,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230606987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:21,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916918025] [2021-07-13 19:48:21,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:21,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:21,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:21,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:21,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916918025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:21,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:21,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:21,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898438825] [2021-07-13 19:48:21,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:21,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:21,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:21,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:21,956 INFO L87 Difference]: Start difference. First operand 856 states and 2944 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:23,021 INFO L93 Difference]: Finished difference Result 1214 states and 3884 transitions. [2021-07-13 19:48:23,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:23,022 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:23,024 INFO L225 Difference]: With dead ends: 1214 [2021-07-13 19:48:23,024 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:48:23,024 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1040.5ms TimeCoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:23,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:48:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 866. [2021-07-13 19:48:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.436994219653179) internal successors, (2973), 865 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2973 transitions. [2021-07-13 19:48:23,038 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2973 transitions. Word has length 20 [2021-07-13 19:48:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:23,038 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 2973 transitions. [2021-07-13 19:48:23,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2973 transitions. [2021-07-13 19:48:23,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:23,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:23,039 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:23,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4678 [2021-07-13 19:48:23,240 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:23,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:23,240 INFO L82 PathProgramCache]: Analyzing trace with hash 802470822, now seen corresponding path program 391 times [2021-07-13 19:48:23,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:23,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201708577] [2021-07-13 19:48:23,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:23,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201708577] [2021-07-13 19:48:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201708577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:23,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747959018] [2021-07-13 19:48:23,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:23,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747959018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:23,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:23,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:23,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149100395] [2021-07-13 19:48:23,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:23,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:23,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:23,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:23,603 INFO L87 Difference]: Start difference. First operand 866 states and 2973 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:24,473 INFO L93 Difference]: Finished difference Result 1143 states and 3731 transitions. [2021-07-13 19:48:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:24,475 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:48:24,475 INFO L226 Difference]: Without dead ends: 1143 [2021-07-13 19:48:24,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-13 19:48:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 854. [2021-07-13 19:48:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-07-13 19:48:24,486 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-07-13 19:48:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:24,487 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-07-13 19:48:24,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-07-13 19:48:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:24,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:24,488 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:24,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4685,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:24,688 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:24,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:24,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2039602932, now seen corresponding path program 392 times [2021-07-13 19:48:24,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:24,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341005049] [2021-07-13 19:48:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:24,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:24,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341005049] [2021-07-13 19:48:24,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341005049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:24,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679965050] [2021-07-13 19:48:24,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:24,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:24,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:24,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:24,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679965050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:24,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:24,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:24,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393590099] [2021-07-13 19:48:24,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:24,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:24,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:24,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:24,979 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:25,511 INFO L93 Difference]: Finished difference Result 1208 states and 3931 transitions. [2021-07-13 19:48:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:25,513 INFO L225 Difference]: With dead ends: 1208 [2021-07-13 19:48:25,513 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:48:25,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:48:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 857. [2021-07-13 19:48:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.4485981308411215) internal successors, (2952), 856 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2952 transitions. [2021-07-13 19:48:25,525 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2952 transitions. Word has length 20 [2021-07-13 19:48:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:25,525 INFO L482 AbstractCegarLoop]: Abstraction has 857 states and 2952 transitions. [2021-07-13 19:48:25,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2952 transitions. [2021-07-13 19:48:25,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:25,526 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:25,526 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:25,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4692 [2021-07-13 19:48:25,726 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:25,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:25,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1503963926, now seen corresponding path program 393 times [2021-07-13 19:48:25,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:25,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677718353] [2021-07-13 19:48:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677718353] [2021-07-13 19:48:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677718353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028265883] [2021-07-13 19:48:25,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:25,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:25,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:26,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028265883] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:26,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:26,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:26,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011953033] [2021-07-13 19:48:26,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:26,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:26,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:26,036 INFO L87 Difference]: Start difference. First operand 857 states and 2952 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:26,687 INFO L93 Difference]: Finished difference Result 1241 states and 4014 transitions. [2021-07-13 19:48:26,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:26,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:26,689 INFO L225 Difference]: With dead ends: 1241 [2021-07-13 19:48:26,689 INFO L226 Difference]: Without dead ends: 1241 [2021-07-13 19:48:26,689 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-07-13 19:48:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 860. [2021-07-13 19:48:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.454016298020955) internal successors, (2967), 859 states have internal predecessors, (2967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2967 transitions. [2021-07-13 19:48:26,706 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2967 transitions. Word has length 20 [2021-07-13 19:48:26,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:26,706 INFO L482 AbstractCegarLoop]: Abstraction has 860 states and 2967 transitions. [2021-07-13 19:48:26,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:26,706 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2967 transitions. [2021-07-13 19:48:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:26,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:26,708 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:26,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4697,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:26,921 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash 120373842, now seen corresponding path program 394 times [2021-07-13 19:48:26,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:26,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889389815] [2021-07-13 19:48:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:26,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889389815] [2021-07-13 19:48:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889389815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728813461] [2021-07-13 19:48:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:27,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:27,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:27,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:27,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728813461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:27,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302104803] [2021-07-13 19:48:27,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:27,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:27,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:27,268 INFO L87 Difference]: Start difference. First operand 860 states and 2967 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:27,962 INFO L93 Difference]: Finished difference Result 1199 states and 3919 transitions. [2021-07-13 19:48:27,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:27,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:27,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:27,964 INFO L225 Difference]: With dead ends: 1199 [2021-07-13 19:48:27,964 INFO L226 Difference]: Without dead ends: 1199 [2021-07-13 19:48:27,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-07-13 19:48:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 854. [2021-07-13 19:48:27,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.443141852286049) internal successors, (2937), 853 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2937 transitions. [2021-07-13 19:48:27,976 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2937 transitions. Word has length 20 [2021-07-13 19:48:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:27,976 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2937 transitions. [2021-07-13 19:48:27,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2937 transitions. [2021-07-13 19:48:27,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:27,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:27,977 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:28,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4704 [2021-07-13 19:48:28,177 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:28,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:28,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1106639882, now seen corresponding path program 395 times [2021-07-13 19:48:28,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:28,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266567925] [2021-07-13 19:48:28,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:28,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266567925] [2021-07-13 19:48:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266567925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:28,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101732140] [2021-07-13 19:48:28,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:28,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:28,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:28,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:28,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101732140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:28,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:28,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788951083] [2021-07-13 19:48:28,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:28,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:28,484 INFO L87 Difference]: Start difference. First operand 854 states and 2937 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:29,063 INFO L93 Difference]: Finished difference Result 1151 states and 3726 transitions. [2021-07-13 19:48:29,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:29,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:29,065 INFO L225 Difference]: With dead ends: 1151 [2021-07-13 19:48:29,065 INFO L226 Difference]: Without dead ends: 1133 [2021-07-13 19:48:29,065 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-07-13 19:48:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 856. [2021-07-13 19:48:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-07-13 19:48:29,077 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-07-13 19:48:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:29,077 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-07-13 19:48:29,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:29,077 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-07-13 19:48:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:29,078 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:29,078 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:29,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4711,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:29,279 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash 905716220, now seen corresponding path program 396 times [2021-07-13 19:48:29,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:29,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431590381] [2021-07-13 19:48:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:29,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:29,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431590381] [2021-07-13 19:48:29,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431590381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:29,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316176864] [2021-07-13 19:48:29,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:29,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:29,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:29,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316176864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:29,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:29,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:29,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199030495] [2021-07-13 19:48:29,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:29,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:29,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:29,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:29,611 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:30,287 INFO L93 Difference]: Finished difference Result 1143 states and 3702 transitions. [2021-07-13 19:48:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:30,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:30,289 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:48:30,289 INFO L226 Difference]: Without dead ends: 1131 [2021-07-13 19:48:30,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 675.2ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-13 19:48:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 858. [2021-07-13 19:48:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.441073512252042) internal successors, (2949), 857 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2949 transitions. [2021-07-13 19:48:30,300 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2949 transitions. Word has length 20 [2021-07-13 19:48:30,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:30,300 INFO L482 AbstractCegarLoop]: Abstraction has 858 states and 2949 transitions. [2021-07-13 19:48:30,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:30,300 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2949 transitions. [2021-07-13 19:48:30,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:30,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:30,301 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:30,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4718 [2021-07-13 19:48:30,502 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1657116658, now seen corresponding path program 397 times [2021-07-13 19:48:30,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:30,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578172602] [2021-07-13 19:48:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:30,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578172602] [2021-07-13 19:48:30,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578172602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:30,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126398028] [2021-07-13 19:48:30,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:30,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:30,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:30,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126398028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:30,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:30,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:30,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329898718] [2021-07-13 19:48:30,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:30,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:30,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:30,834 INFO L87 Difference]: Start difference. First operand 858 states and 2949 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:31,665 INFO L93 Difference]: Finished difference Result 1172 states and 3764 transitions. [2021-07-13 19:48:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:31,667 INFO L225 Difference]: With dead ends: 1172 [2021-07-13 19:48:31,667 INFO L226 Difference]: Without dead ends: 1166 [2021-07-13 19:48:31,667 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 820.1ms TimeCoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:48:31,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2021-07-13 19:48:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 868. [2021-07-13 19:48:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.4348327566320647) internal successors, (2978), 867 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2978 transitions. [2021-07-13 19:48:31,678 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2978 transitions. Word has length 20 [2021-07-13 19:48:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:31,678 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2978 transitions. [2021-07-13 19:48:31,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:31,678 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2978 transitions. [2021-07-13 19:48:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:31,679 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:31,679 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:31,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4727,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:31,880 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -258307268, now seen corresponding path program 398 times [2021-07-13 19:48:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:31,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952307905] [2021-07-13 19:48:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:31,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:31,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952307905] [2021-07-13 19:48:31,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952307905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:31,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78172959] [2021-07-13 19:48:31,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:32,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:32,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:32,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:32,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:32,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78172959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:32,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:32,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303896765] [2021-07-13 19:48:32,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:32,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:32,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:32,271 INFO L87 Difference]: Start difference. First operand 868 states and 2978 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:32,633 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 30 [2021-07-13 19:48:32,769 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-07-13 19:48:32,917 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-07-13 19:48:33,043 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-07-13 19:48:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:33,122 INFO L93 Difference]: Finished difference Result 1114 states and 3656 transitions. [2021-07-13 19:48:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:33,122 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:33,124 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:48:33,124 INFO L226 Difference]: Without dead ends: 1114 [2021-07-13 19:48:33,124 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 895.5ms TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-13 19:48:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 856. [2021-07-13 19:48:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 3.44093567251462) internal successors, (2942), 855 states have internal predecessors, (2942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2942 transitions. [2021-07-13 19:48:33,135 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2942 transitions. Word has length 20 [2021-07-13 19:48:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:33,135 INFO L482 AbstractCegarLoop]: Abstraction has 856 states and 2942 transitions. [2021-07-13 19:48:33,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2942 transitions. [2021-07-13 19:48:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:33,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:33,136 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:33,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4735,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:33,337 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1245686878, now seen corresponding path program 399 times [2021-07-13 19:48:33,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:33,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138963090] [2021-07-13 19:48:33,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:33,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138963090] [2021-07-13 19:48:33,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138963090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592329527] [2021-07-13 19:48:33,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:33,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592329527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:33,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:33,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:33,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589394566] [2021-07-13 19:48:33,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:33,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:33,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:33,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:33,652 INFO L87 Difference]: Start difference. First operand 856 states and 2942 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:34,072 INFO L93 Difference]: Finished difference Result 1271 states and 4076 transitions. [2021-07-13 19:48:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:34,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:34,074 INFO L225 Difference]: With dead ends: 1271 [2021-07-13 19:48:34,074 INFO L226 Difference]: Without dead ends: 1271 [2021-07-13 19:48:34,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-07-13 19:48:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 849. [2021-07-13 19:48:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 3.4351415094339623) internal successors, (2913), 848 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2913 transitions. [2021-07-13 19:48:34,086 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2913 transitions. Word has length 20 [2021-07-13 19:48:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:34,086 INFO L482 AbstractCegarLoop]: Abstraction has 849 states and 2913 transitions. [2021-07-13 19:48:34,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,086 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2913 transitions. [2021-07-13 19:48:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:34,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:34,087 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:34,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4747,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,288 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:34,288 INFO L82 PathProgramCache]: Analyzing trace with hash 766669224, now seen corresponding path program 400 times [2021-07-13 19:48:34,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:34,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227786379] [2021-07-13 19:48:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:34,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227786379] [2021-07-13 19:48:34,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227786379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535813746] [2021-07-13 19:48:34,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:34,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:34,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535813746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:34,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:34,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:34,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607693852] [2021-07-13 19:48:34,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:34,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:34,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:34,582 INFO L87 Difference]: Start difference. First operand 849 states and 2913 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:34,981 INFO L93 Difference]: Finished difference Result 1219 states and 3951 transitions. [2021-07-13 19:48:34,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:34,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:34,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:34,983 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 19:48:34,983 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 19:48:34,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 19:48:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 848. [2021-07-13 19:48:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.436835891381346) internal successors, (2911), 847 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2911 transitions. [2021-07-13 19:48:34,995 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2911 transitions. Word has length 20 [2021-07-13 19:48:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:34,995 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2911 transitions. [2021-07-13 19:48:34,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:34,995 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2911 transitions. [2021-07-13 19:48:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:34,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:34,996 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:35,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:35,197 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1518069662, now seen corresponding path program 401 times [2021-07-13 19:48:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:35,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240179794] [2021-07-13 19:48:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:35,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:35,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240179794] [2021-07-13 19:48:35,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240179794] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:35,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12854293] [2021-07-13 19:48:35,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:35,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:35,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:35,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:35,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:35,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12854293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:35,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:35,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:48:35,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856280632] [2021-07-13 19:48:35,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:48:35,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:48:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:48:35,521 INFO L87 Difference]: Start difference. First operand 848 states and 2911 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:35,986 INFO L93 Difference]: Finished difference Result 1239 states and 3990 transitions. [2021-07-13 19:48:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:35,988 INFO L225 Difference]: With dead ends: 1239 [2021-07-13 19:48:35,988 INFO L226 Difference]: Without dead ends: 1239 [2021-07-13 19:48:35,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:48:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-07-13 19:48:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 847. [2021-07-13 19:48:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.434988179669031) internal successors, (2906), 846 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2906 transitions. [2021-07-13 19:48:36,000 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2906 transitions. Word has length 20 [2021-07-13 19:48:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:36,000 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2906 transitions. [2021-07-13 19:48:36,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2906 transitions. [2021-07-13 19:48:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:36,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:36,001 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:36,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4758,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,202 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:36,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:36,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1152559866, now seen corresponding path program 402 times [2021-07-13 19:48:36,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:36,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561821293] [2021-07-13 19:48:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:36,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:36,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561821293] [2021-07-13 19:48:36,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561821293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:36,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761969802] [2021-07-13 19:48:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:36,370 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:36,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:36,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:36,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761969802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:36,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:36,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:48:36,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639199459] [2021-07-13 19:48:36,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:48:36,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:36,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:48:36,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:36,528 INFO L87 Difference]: Start difference. First operand 847 states and 2906 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:36,981 INFO L93 Difference]: Finished difference Result 1197 states and 3895 transitions. [2021-07-13 19:48:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:48:36,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:36,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:36,983 INFO L225 Difference]: With dead ends: 1197 [2021-07-13 19:48:36,984 INFO L226 Difference]: Without dead ends: 1197 [2021-07-13 19:48:36,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-13 19:48:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 830. [2021-07-13 19:48:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-07-13 19:48:36,995 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-07-13 19:48:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:36,995 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-07-13 19:48:36,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-07-13 19:48:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:36,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:36,996 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:37,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4764 [2021-07-13 19:48:37,197 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:37,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:37,197 INFO L82 PathProgramCache]: Analyzing trace with hash 55260776, now seen corresponding path program 403 times [2021-07-13 19:48:37,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:37,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807960616] [2021-07-13 19:48:37,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:37,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:37,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807960616] [2021-07-13 19:48:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807960616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:37,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513894529] [2021-07-13 19:48:37,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:37,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513894529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:37,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:37,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:48:37,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991004521] [2021-07-13 19:48:37,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:48:37,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:48:37,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:48:37,409 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:37,642 INFO L93 Difference]: Finished difference Result 1184 states and 3800 transitions. [2021-07-13 19:48:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:37,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:37,644 INFO L225 Difference]: With dead ends: 1184 [2021-07-13 19:48:37,644 INFO L226 Difference]: Without dead ends: 1184 [2021-07-13 19:48:37,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:48:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-07-13 19:48:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 835. [2021-07-13 19:48:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.4268585131894485) internal successors, (2858), 834 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2858 transitions. [2021-07-13 19:48:37,655 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2858 transitions. Word has length 20 [2021-07-13 19:48:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:37,655 INFO L482 AbstractCegarLoop]: Abstraction has 835 states and 2858 transitions. [2021-07-13 19:48:37,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2858 transitions. [2021-07-13 19:48:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:37,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:37,656 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:37,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4770 [2021-07-13 19:48:37,857 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1613471838, now seen corresponding path program 404 times [2021-07-13 19:48:37,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:37,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569731835] [2021-07-13 19:48:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:37,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569731835] [2021-07-13 19:48:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569731835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:37,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9294291] [2021-07-13 19:48:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:38,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:38,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:38,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:38,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:38,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9294291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:38,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:38,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:38,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417279549] [2021-07-13 19:48:38,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:38,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:38,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:38,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:38,087 INFO L87 Difference]: Start difference. First operand 835 states and 2858 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:38,461 INFO L93 Difference]: Finished difference Result 1264 states and 4000 transitions. [2021-07-13 19:48:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:38,463 INFO L225 Difference]: With dead ends: 1264 [2021-07-13 19:48:38,463 INFO L226 Difference]: Without dead ends: 1264 [2021-07-13 19:48:38,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-07-13 19:48:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 838. [2021-07-13 19:48:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.4241338112305852) internal successors, (2866), 837 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:38,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2866 transitions. [2021-07-13 19:48:38,475 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2866 transitions. Word has length 20 [2021-07-13 19:48:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:38,475 INFO L482 AbstractCegarLoop]: Abstraction has 838 states and 2866 transitions. [2021-07-13 19:48:38,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2866 transitions. [2021-07-13 19:48:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:38,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:38,476 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:38,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4772 [2021-07-13 19:48:38,677 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash 827417818, now seen corresponding path program 405 times [2021-07-13 19:48:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:38,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358366024] [2021-07-13 19:48:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:38,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:38,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358366024] [2021-07-13 19:48:38,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358366024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:38,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434638785] [2021-07-13 19:48:38,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:38,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:48:38,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:38,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:38,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:38,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434638785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:38,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:38,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:38,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635961467] [2021-07-13 19:48:38,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:38,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:38,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:38,960 INFO L87 Difference]: Start difference. First operand 838 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:39,243 INFO L93 Difference]: Finished difference Result 1151 states and 3695 transitions. [2021-07-13 19:48:39,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:39,243 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:39,245 INFO L225 Difference]: With dead ends: 1151 [2021-07-13 19:48:39,245 INFO L226 Difference]: Without dead ends: 1144 [2021-07-13 19:48:39,245 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-13 19:48:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 851. [2021-07-13 19:48:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-07-13 19:48:39,256 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-07-13 19:48:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:39,256 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-07-13 19:48:39,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-07-13 19:48:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:39,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:39,258 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:39,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4775,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:39,458 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:39,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1973137240, now seen corresponding path program 406 times [2021-07-13 19:48:39,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:39,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84423769] [2021-07-13 19:48:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:39,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84423769] [2021-07-13 19:48:39,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84423769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:39,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123990276] [2021-07-13 19:48:39,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:39,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:39,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123990276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:39,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:39,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:39,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62799035] [2021-07-13 19:48:39,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:39,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:39,692 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:40,405 INFO L93 Difference]: Finished difference Result 1375 states and 4282 transitions. [2021-07-13 19:48:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:48:40,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:40,408 INFO L225 Difference]: With dead ends: 1375 [2021-07-13 19:48:40,408 INFO L226 Difference]: Without dead ends: 1375 [2021-07-13 19:48:40,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:48:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2021-07-13 19:48:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 851. [2021-07-13 19:48:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.418823529411765) internal successors, (2906), 850 states have internal predecessors, (2906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2906 transitions. [2021-07-13 19:48:40,420 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2906 transitions. Word has length 20 [2021-07-13 19:48:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:40,420 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2906 transitions. [2021-07-13 19:48:40,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2906 transitions. [2021-07-13 19:48:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:40,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:40,421 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:40,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4781 [2021-07-13 19:48:40,622 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash 827922334, now seen corresponding path program 407 times [2021-07-13 19:48:40,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:40,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337075686] [2021-07-13 19:48:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:40,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337075686] [2021-07-13 19:48:40,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337075686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221046580] [2021-07-13 19:48:40,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:40,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:48:40,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:40,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:40,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:40,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221046580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:40,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:40,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:40,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612157331] [2021-07-13 19:48:40,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:40,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:40,852 INFO L87 Difference]: Start difference. First operand 851 states and 2906 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:41,193 INFO L93 Difference]: Finished difference Result 1253 states and 3969 transitions. [2021-07-13 19:48:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:41,195 INFO L225 Difference]: With dead ends: 1253 [2021-07-13 19:48:41,195 INFO L226 Difference]: Without dead ends: 1247 [2021-07-13 19:48:41,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:41,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-07-13 19:48:41,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 851. [2021-07-13 19:48:41,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 851 states, 850 states have (on average 3.415294117647059) internal successors, (2903), 850 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 851 states to 851 states and 2903 transitions. [2021-07-13 19:48:41,206 INFO L78 Accepts]: Start accepts. Automaton has 851 states and 2903 transitions. Word has length 20 [2021-07-13 19:48:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:41,206 INFO L482 AbstractCegarLoop]: Abstraction has 851 states and 2903 transitions. [2021-07-13 19:48:41,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 851 states and 2903 transitions. [2021-07-13 19:48:41,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:41,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:41,207 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:41,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4786,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:41,408 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:41,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:41,408 INFO L82 PathProgramCache]: Analyzing trace with hash -613020500, now seen corresponding path program 408 times [2021-07-13 19:48:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:41,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931839027] [2021-07-13 19:48:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:41,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931839027] [2021-07-13 19:48:41,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931839027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:41,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380978441] [2021-07-13 19:48:41,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:41,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:48:41,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:41,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380978441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:41,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:41,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:41,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866984950] [2021-07-13 19:48:41,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:41,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:41,678 INFO L87 Difference]: Start difference. First operand 851 states and 2903 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:41,873 INFO L93 Difference]: Finished difference Result 1114 states and 3618 transitions. [2021-07-13 19:48:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:41,875 INFO L225 Difference]: With dead ends: 1114 [2021-07-13 19:48:41,875 INFO L226 Difference]: Without dead ends: 1114 [2021-07-13 19:48:41,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-13 19:48:41,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 830. [2021-07-13 19:48:41,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-07-13 19:48:41,886 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-07-13 19:48:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:41,886 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-07-13 19:48:41,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-07-13 19:48:41,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:41,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:41,887 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:42,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-07-13 19:48:42,088 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:42,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1170572698, now seen corresponding path program 409 times [2021-07-13 19:48:42,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:42,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041123971] [2021-07-13 19:48:42,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:42,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041123971] [2021-07-13 19:48:42,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041123971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:42,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636646627] [2021-07-13 19:48:42,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:42,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:42,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:42,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636646627] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:42,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:42,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:42,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971177607] [2021-07-13 19:48:42,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:42,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:42,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:42,328 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:42,546 INFO L93 Difference]: Finished difference Result 1119 states and 3616 transitions. [2021-07-13 19:48:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:42,548 INFO L225 Difference]: With dead ends: 1119 [2021-07-13 19:48:42,548 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:48:42,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:48:42,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:48:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 833. [2021-07-13 19:48:42,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4290865384615383) internal successors, (2853), 832 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:42,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2853 transitions. [2021-07-13 19:48:42,559 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2853 transitions. Word has length 20 [2021-07-13 19:48:42,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:42,559 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2853 transitions. [2021-07-13 19:48:42,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:42,559 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2853 transitions. [2021-07-13 19:48:42,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:42,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:42,560 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:42,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4797,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:42,760 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:42,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:42,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1878930916, now seen corresponding path program 410 times [2021-07-13 19:48:42,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:42,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479181237] [2021-07-13 19:48:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:42,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479181237] [2021-07-13 19:48:42,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479181237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:42,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177087008] [2021-07-13 19:48:42,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:42,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:43,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177087008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:43,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:43,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:43,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692558159] [2021-07-13 19:48:43,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:43,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:43,053 INFO L87 Difference]: Start difference. First operand 833 states and 2853 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:43,408 INFO L93 Difference]: Finished difference Result 1161 states and 3742 transitions. [2021-07-13 19:48:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:43,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:43,410 INFO L225 Difference]: With dead ends: 1161 [2021-07-13 19:48:43,410 INFO L226 Difference]: Without dead ends: 1161 [2021-07-13 19:48:43,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:43,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-07-13 19:48:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 830. [2021-07-13 19:48:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-07-13 19:48:43,421 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-07-13 19:48:43,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:43,422 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-07-13 19:48:43,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-07-13 19:48:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:43,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:43,423 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:43,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4799,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:43,623 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash -227853204, now seen corresponding path program 411 times [2021-07-13 19:48:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:43,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315785685] [2021-07-13 19:48:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:43,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315785685] [2021-07-13 19:48:43,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315785685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:43,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372363787] [2021-07-13 19:48:43,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:43,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:43,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:43,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:43,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372363787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:43,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:43,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:43,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298608094] [2021-07-13 19:48:43,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:43,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:43,874 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:44,141 INFO L93 Difference]: Finished difference Result 1144 states and 3661 transitions. [2021-07-13 19:48:44,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:44,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:44,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:44,143 INFO L225 Difference]: With dead ends: 1144 [2021-07-13 19:48:44,143 INFO L226 Difference]: Without dead ends: 1144 [2021-07-13 19:48:44,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2021-07-13 19:48:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 830. [2021-07-13 19:48:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4318455971049455) internal successors, (2845), 829 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2845 transitions. [2021-07-13 19:48:44,154 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2845 transitions. Word has length 20 [2021-07-13 19:48:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:44,154 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2845 transitions. [2021-07-13 19:48:44,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2845 transitions. [2021-07-13 19:48:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:44,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:44,156 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:44,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4806,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:44,356 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1183905348, now seen corresponding path program 412 times [2021-07-13 19:48:44,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:44,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315313252] [2021-07-13 19:48:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:44,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315313252] [2021-07-13 19:48:44,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315313252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:44,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951902350] [2021-07-13 19:48:44,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:44,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:44,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:44,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951902350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:44,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:44,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:48:44,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028854840] [2021-07-13 19:48:44,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:48:44,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:44,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:48:44,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:48:44,611 INFO L87 Difference]: Start difference. First operand 830 states and 2845 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:44,931 INFO L93 Difference]: Finished difference Result 1029 states and 3385 transitions. [2021-07-13 19:48:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:44,931 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:44,933 INFO L225 Difference]: With dead ends: 1029 [2021-07-13 19:48:44,933 INFO L226 Difference]: Without dead ends: 1017 [2021-07-13 19:48:44,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-13 19:48:44,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 819. [2021-07-13 19:48:44,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4388753056234718) internal successors, (2813), 818 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2813 transitions. [2021-07-13 19:48:44,943 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2813 transitions. Word has length 20 [2021-07-13 19:48:44,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:44,943 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2813 transitions. [2021-07-13 19:48:44,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2813 transitions. [2021-07-13 19:48:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:44,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:44,944 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:45,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4811 [2021-07-13 19:48:45,144 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:45,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:45,145 INFO L82 PathProgramCache]: Analyzing trace with hash -343837518, now seen corresponding path program 413 times [2021-07-13 19:48:45,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:45,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765826994] [2021-07-13 19:48:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:45,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765826994] [2021-07-13 19:48:45,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765826994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65821984] [2021-07-13 19:48:45,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:45,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:45,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:45,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:45,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65821984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:45,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:48:45,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115246637] [2021-07-13 19:48:45,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:48:45,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:45,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:48:45,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:48:45,385 INFO L87 Difference]: Start difference. First operand 819 states and 2813 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:45,718 INFO L93 Difference]: Finished difference Result 1469 states and 4603 transitions. [2021-07-13 19:48:45,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:48:45,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:45,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:45,721 INFO L225 Difference]: With dead ends: 1469 [2021-07-13 19:48:45,721 INFO L226 Difference]: Without dead ends: 1469 [2021-07-13 19:48:45,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:48:45,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-07-13 19:48:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 826. [2021-07-13 19:48:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.443636363636364) internal successors, (2841), 825 states have internal predecessors, (2841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2841 transitions. [2021-07-13 19:48:45,733 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2841 transitions. Word has length 20 [2021-07-13 19:48:45,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:45,733 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2841 transitions. [2021-07-13 19:48:45,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2841 transitions. [2021-07-13 19:48:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:45,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:45,734 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:45,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4818,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:45,935 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:45,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:45,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1214373544, now seen corresponding path program 414 times [2021-07-13 19:48:45,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:45,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110362016] [2021-07-13 19:48:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110362016] [2021-07-13 19:48:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110362016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114541113] [2021-07-13 19:48:45,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:46,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:46,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:46,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:46,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:46,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114541113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:46,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:46,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:46,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427763120] [2021-07-13 19:48:46,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:46,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:46,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:46,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:46,211 INFO L87 Difference]: Start difference. First operand 826 states and 2841 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:46,733 INFO L93 Difference]: Finished difference Result 1609 states and 4942 transitions. [2021-07-13 19:48:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:48:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:46,736 INFO L225 Difference]: With dead ends: 1609 [2021-07-13 19:48:46,736 INFO L226 Difference]: Without dead ends: 1609 [2021-07-13 19:48:46,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 470.3ms TimeCoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:48:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2021-07-13 19:48:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 832. [2021-07-13 19:48:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-07-13 19:48:46,749 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-07-13 19:48:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:46,749 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-07-13 19:48:46,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-07-13 19:48:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:46,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:46,750 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:46,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4822,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:46,950 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 428319524, now seen corresponding path program 415 times [2021-07-13 19:48:46,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:46,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202446077] [2021-07-13 19:48:46,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:47,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:47,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202446077] [2021-07-13 19:48:47,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202446077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:47,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317656326] [2021-07-13 19:48:47,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:47,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:47,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317656326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:47,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:47,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:47,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644974271] [2021-07-13 19:48:47,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:47,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:47,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:47,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:47,277 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:47,757 INFO L93 Difference]: Finished difference Result 1334 states and 4217 transitions. [2021-07-13 19:48:47,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:47,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:47,760 INFO L225 Difference]: With dead ends: 1334 [2021-07-13 19:48:47,760 INFO L226 Difference]: Without dead ends: 1327 [2021-07-13 19:48:47,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 496.5ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:47,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-07-13 19:48:47,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 845. [2021-07-13 19:48:47,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.4360189573459716) internal successors, (2900), 844 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2900 transitions. [2021-07-13 19:48:47,772 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2900 transitions. Word has length 20 [2021-07-13 19:48:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:47,772 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2900 transitions. [2021-07-13 19:48:47,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:47,772 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2900 transitions. [2021-07-13 19:48:47,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:47,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:47,773 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:47,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4827 [2021-07-13 19:48:47,974 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:47,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:47,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1922731762, now seen corresponding path program 416 times [2021-07-13 19:48:47,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:47,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625046869] [2021-07-13 19:48:47,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:47,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:48,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:48,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625046869] [2021-07-13 19:48:48,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625046869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:48,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427906671] [2021-07-13 19:48:48,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:48,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:48,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:48,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:48,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:48,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427906671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:48,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:48,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:48,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42522599] [2021-07-13 19:48:48,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:48,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:48,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:48,289 INFO L87 Difference]: Start difference. First operand 845 states and 2900 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:49,354 INFO L93 Difference]: Finished difference Result 1808 states and 5449 transitions. [2021-07-13 19:48:49,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:48:49,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:49,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:49,357 INFO L225 Difference]: With dead ends: 1808 [2021-07-13 19:48:49,357 INFO L226 Difference]: Without dead ends: 1808 [2021-07-13 19:48:49,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 917.6ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:48:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-07-13 19:48:49,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 848. [2021-07-13 19:48:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.4403778040141675) internal successors, (2914), 847 states have internal predecessors, (2914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2914 transitions. [2021-07-13 19:48:49,373 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2914 transitions. Word has length 20 [2021-07-13 19:48:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:49,373 INFO L482 AbstractCegarLoop]: Abstraction has 848 states and 2914 transitions. [2021-07-13 19:48:49,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2914 transitions. [2021-07-13 19:48:49,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:49,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:49,374 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:49,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4836 [2021-07-13 19:48:49,574 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash 428824040, now seen corresponding path program 417 times [2021-07-13 19:48:49,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:49,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274827807] [2021-07-13 19:48:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:49,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274827807] [2021-07-13 19:48:49,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274827807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:49,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817652734] [2021-07-13 19:48:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:49,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:48:49,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:49,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:49,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817652734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:49,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:49,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:49,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337160129] [2021-07-13 19:48:49,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:49,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:49,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:49,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:49,832 INFO L87 Difference]: Start difference. First operand 848 states and 2914 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:50,258 INFO L93 Difference]: Finished difference Result 1465 states and 4586 transitions. [2021-07-13 19:48:50,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:50,261 INFO L225 Difference]: With dead ends: 1465 [2021-07-13 19:48:50,261 INFO L226 Difference]: Without dead ends: 1459 [2021-07-13 19:48:50,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 342.6ms TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-07-13 19:48:50,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 854. [2021-07-13 19:48:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.4279015240328254) internal successors, (2924), 853 states have internal predecessors, (2924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2924 transitions. [2021-07-13 19:48:50,274 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2924 transitions. Word has length 20 [2021-07-13 19:48:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:50,274 INFO L482 AbstractCegarLoop]: Abstraction has 854 states and 2924 transitions. [2021-07-13 19:48:50,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2924 transitions. [2021-07-13 19:48:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:50,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:50,275 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:50,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4844,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:50,475 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:50,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1012118794, now seen corresponding path program 418 times [2021-07-13 19:48:50,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:50,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646846091] [2021-07-13 19:48:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:50,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646846091] [2021-07-13 19:48:50,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646846091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:50,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837111404] [2021-07-13 19:48:50,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:50,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:50,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:50,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837111404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:50,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:50,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:50,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544761553] [2021-07-13 19:48:50,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:50,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:50,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:50,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:50,792 INFO L87 Difference]: Start difference. First operand 854 states and 2924 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:51,120 INFO L93 Difference]: Finished difference Result 1306 states and 4167 transitions. [2021-07-13 19:48:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:51,122 INFO L225 Difference]: With dead ends: 1306 [2021-07-13 19:48:51,122 INFO L226 Difference]: Without dead ends: 1306 [2021-07-13 19:48:51,123 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2021-07-13 19:48:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 833. [2021-07-13 19:48:51,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-07-13 19:48:51,135 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-07-13 19:48:51,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:51,135 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-07-13 19:48:51,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,135 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-07-13 19:48:51,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:51,136 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:51,136 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:51,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4852,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,337 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:51,337 INFO L82 PathProgramCache]: Analyzing trace with hash -120644928, now seen corresponding path program 419 times [2021-07-13 19:48:51,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:51,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936018780] [2021-07-13 19:48:51,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936018780] [2021-07-13 19:48:51,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936018780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241309575] [2021-07-13 19:48:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:51,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:51,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:51,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:51,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:51,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241309575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:51,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:51,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:51,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42951711] [2021-07-13 19:48:51,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:51,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:51,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:51,633 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:51,936 INFO L93 Difference]: Finished difference Result 1229 states and 3953 transitions. [2021-07-13 19:48:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:48:51,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:51,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:51,938 INFO L225 Difference]: With dead ends: 1229 [2021-07-13 19:48:51,938 INFO L226 Difference]: Without dead ends: 1204 [2021-07-13 19:48:51,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:48:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2021-07-13 19:48:51,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 829. [2021-07-13 19:48:51,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-07-13 19:48:51,949 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-07-13 19:48:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:51,950 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-07-13 19:48:51,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-07-13 19:48:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:51,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:51,951 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:52,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4859 [2021-07-13 19:48:52,151 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 197477672, now seen corresponding path program 420 times [2021-07-13 19:48:52,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:52,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355256301] [2021-07-13 19:48:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:52,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355256301] [2021-07-13 19:48:52,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355256301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:52,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243074877] [2021-07-13 19:48:52,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:52,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:52,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243074877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:52,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:52,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:48:52,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690634767] [2021-07-13 19:48:52,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:48:52,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:52,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:48:52,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:48:52,436 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:52,738 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-07-13 19:48:52,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:52,741 INFO L225 Difference]: With dead ends: 1475 [2021-07-13 19:48:52,741 INFO L226 Difference]: Without dead ends: 1475 [2021-07-13 19:48:52,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:52,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-07-13 19:48:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 816. [2021-07-13 19:48:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-07-13 19:48:52,753 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-07-13 19:48:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:52,753 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-07-13 19:48:52,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-07-13 19:48:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:52,755 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:52,755 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:52,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4866,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:52,955 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash -717536728, now seen corresponding path program 421 times [2021-07-13 19:48:52,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:52,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125107712] [2021-07-13 19:48:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125107712] [2021-07-13 19:48:53,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125107712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854101515] [2021-07-13 19:48:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:53,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854101515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:53,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903149589] [2021-07-13 19:48:53,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:53,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:53,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:53,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:53,235 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:53,517 INFO L93 Difference]: Finished difference Result 1396 states and 4422 transitions. [2021-07-13 19:48:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:53,519 INFO L225 Difference]: With dead ends: 1396 [2021-07-13 19:48:53,519 INFO L226 Difference]: Without dead ends: 1396 [2021-07-13 19:48:53,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 220.6ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-07-13 19:48:53,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 819. [2021-07-13 19:48:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4535452322738385) internal successors, (2825), 818 states have internal predecessors, (2825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2825 transitions. [2021-07-13 19:48:53,539 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2825 transitions. Word has length 20 [2021-07-13 19:48:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2825 transitions. [2021-07-13 19:48:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2825 transitions. [2021-07-13 19:48:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:53,540 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:53,540 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:53,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4870,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:53,741 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:53,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:53,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1484382876, now seen corresponding path program 422 times [2021-07-13 19:48:53,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:53,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141837828] [2021-07-13 19:48:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:53,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:53,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141837828] [2021-07-13 19:48:53,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141837828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:53,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969714906] [2021-07-13 19:48:53,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:53,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:53,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:53,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969714906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:54,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:54,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677041533] [2021-07-13 19:48:54,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:54,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:54,045 INFO L87 Difference]: Start difference. First operand 819 states and 2825 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:54,493 INFO L93 Difference]: Finished difference Result 1428 states and 4503 transitions. [2021-07-13 19:48:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:48:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:54,496 INFO L225 Difference]: With dead ends: 1428 [2021-07-13 19:48:54,496 INFO L226 Difference]: Without dead ends: 1428 [2021-07-13 19:48:54,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:48:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-13 19:48:54,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 820. [2021-07-13 19:48:54,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.456654456654457) internal successors, (2831), 819 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2831 transitions. [2021-07-13 19:48:54,508 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2831 transitions. Word has length 20 [2021-07-13 19:48:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:54,509 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2831 transitions. [2021-07-13 19:48:54,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2831 transitions. [2021-07-13 19:48:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:54,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:54,510 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:54,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4874,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:54,710 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 853447464, now seen corresponding path program 423 times [2021-07-13 19:48:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:54,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265846469] [2021-07-13 19:48:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:54,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:54,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265846469] [2021-07-13 19:48:54,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265846469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:54,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889441100] [2021-07-13 19:48:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:54,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:48:54,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:54,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889441100] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:55,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:55,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:55,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046101827] [2021-07-13 19:48:55,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:55,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:55,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:55,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:55,020 INFO L87 Difference]: Start difference. First operand 820 states and 2831 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:55,278 INFO L93 Difference]: Finished difference Result 1395 states and 4426 transitions. [2021-07-13 19:48:55,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:48:55,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:55,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:55,281 INFO L225 Difference]: With dead ends: 1395 [2021-07-13 19:48:55,281 INFO L226 Difference]: Without dead ends: 1395 [2021-07-13 19:48:55,281 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:48:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-07-13 19:48:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 810. [2021-07-13 19:48:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4437577255871448) internal successors, (2786), 809 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2786 transitions. [2021-07-13 19:48:55,293 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2786 transitions. Word has length 20 [2021-07-13 19:48:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:55,293 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2786 transitions. [2021-07-13 19:48:55,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:55,293 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2786 transitions. [2021-07-13 19:48:55,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:55,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:55,294 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:55,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4881 [2021-07-13 19:48:55,494 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:55,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:55,495 INFO L82 PathProgramCache]: Analyzing trace with hash 43506906, now seen corresponding path program 424 times [2021-07-13 19:48:55,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:55,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263855772] [2021-07-13 19:48:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263855772] [2021-07-13 19:48:55,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263855772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:55,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896764955] [2021-07-13 19:48:55,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:55,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:48:55,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:55,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:55,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896764955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:55,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:55,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:55,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646532243] [2021-07-13 19:48:55,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:55,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:55,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:55,797 INFO L87 Difference]: Start difference. First operand 810 states and 2786 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:56,379 INFO L93 Difference]: Finished difference Result 1537 states and 4757 transitions. [2021-07-13 19:48:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:48:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:56,382 INFO L225 Difference]: With dead ends: 1537 [2021-07-13 19:48:56,382 INFO L226 Difference]: Without dead ends: 1537 [2021-07-13 19:48:56,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:48:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-07-13 19:48:56,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 814. [2021-07-13 19:48:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4477244772447726) internal successors, (2803), 813 states have internal predecessors, (2803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:56,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2803 transitions. [2021-07-13 19:48:56,395 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2803 transitions. Word has length 20 [2021-07-13 19:48:56,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:56,395 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2803 transitions. [2021-07-13 19:48:56,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2803 transitions. [2021-07-13 19:48:56,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:56,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:56,396 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:56,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4888,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:56,596 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:56,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash -742547114, now seen corresponding path program 425 times [2021-07-13 19:48:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:56,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287965171] [2021-07-13 19:48:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287965171] [2021-07-13 19:48:56,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287965171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004671411] [2021-07-13 19:48:56,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:56,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:48:56,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:56,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:56,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:56,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004671411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:56,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:56,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:56,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328121451] [2021-07-13 19:48:56,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:56,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:56,944 INFO L87 Difference]: Start difference. First operand 814 states and 2803 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:57,483 INFO L93 Difference]: Finished difference Result 1337 states and 4202 transitions. [2021-07-13 19:48:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:48:57,483 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:57,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:57,485 INFO L225 Difference]: With dead ends: 1337 [2021-07-13 19:48:57,486 INFO L226 Difference]: Without dead ends: 1330 [2021-07-13 19:48:57,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 531.7ms TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:48:57,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-07-13 19:48:57,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 827. [2021-07-13 19:48:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4418886198547214) internal successors, (2843), 826 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2843 transitions. [2021-07-13 19:48:57,498 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2843 transitions. Word has length 20 [2021-07-13 19:48:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:57,498 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2843 transitions. [2021-07-13 19:48:57,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:57,498 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2843 transitions. [2021-07-13 19:48:57,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:57,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:57,499 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:57,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-07-13 19:48:57,700 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash 751865124, now seen corresponding path program 426 times [2021-07-13 19:48:57,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:57,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079624662] [2021-07-13 19:48:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079624662] [2021-07-13 19:48:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079624662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507946671] [2021-07-13 19:48:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:57,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:48:57,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:48:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:57,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507946671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:57,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:57,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:57,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920170163] [2021-07-13 19:48:57,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:57,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:57,986 INFO L87 Difference]: Start difference. First operand 827 states and 2843 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:58,828 INFO L93 Difference]: Finished difference Result 1650 states and 5058 transitions. [2021-07-13 19:48:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:48:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:58,831 INFO L225 Difference]: With dead ends: 1650 [2021-07-13 19:48:58,831 INFO L226 Difference]: Without dead ends: 1650 [2021-07-13 19:48:58,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 764.8ms TimeCoverageRelationStatistics Valid=209, Invalid=847, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:48:58,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-07-13 19:48:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 830. [2021-07-13 19:48:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4463208685162847) internal successors, (2857), 829 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2857 transitions. [2021-07-13 19:48:58,845 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2857 transitions. Word has length 20 [2021-07-13 19:48:58,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:58,845 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2857 transitions. [2021-07-13 19:48:58,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2857 transitions. [2021-07-13 19:48:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:58,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:58,846 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:59,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4902 [2021-07-13 19:48:59,047 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:59,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash -742042598, now seen corresponding path program 427 times [2021-07-13 19:48:59,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:59,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41667376] [2021-07-13 19:48:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:59,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41667376] [2021-07-13 19:48:59,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41667376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536110429] [2021-07-13 19:48:59,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:48:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:48:59,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:48:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536110429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:48:59,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:48:59,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062257646] [2021-07-13 19:48:59,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:48:59,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:48:59,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:48:59,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:48:59,337 INFO L87 Difference]: Start difference. First operand 830 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:48:59,694 INFO L93 Difference]: Finished difference Result 1375 states and 4358 transitions. [2021-07-13 19:48:59,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:48:59,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:48:59,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:48:59,696 INFO L225 Difference]: With dead ends: 1375 [2021-07-13 19:48:59,696 INFO L226 Difference]: Without dead ends: 1369 [2021-07-13 19:48:59,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 324.4ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:48:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-13 19:48:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 836. [2021-07-13 19:48:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.4335329341317364) internal successors, (2867), 835 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2867 transitions. [2021-07-13 19:48:59,708 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2867 transitions. Word has length 20 [2021-07-13 19:48:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:48:59,708 INFO L482 AbstractCegarLoop]: Abstraction has 836 states and 2867 transitions. [2021-07-13 19:48:59,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:48:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2867 transitions. [2021-07-13 19:48:59,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:48:59,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:48:59,710 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:48:59,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4909 [2021-07-13 19:48:59,910 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:48:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:48:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2111981864, now seen corresponding path program 428 times [2021-07-13 19:48:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:48:59,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188342901] [2021-07-13 19:48:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:48:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:48:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:48:59,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:48:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188342901] [2021-07-13 19:48:59,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188342901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:48:59,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770475471] [2021-07-13 19:48:59,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:00,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:00,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770475471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:00,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:00,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:00,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977556096] [2021-07-13 19:49:00,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:00,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:00,295 INFO L87 Difference]: Start difference. First operand 836 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:00,638 INFO L93 Difference]: Finished difference Result 1262 states and 4041 transitions. [2021-07-13 19:49:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:00,640 INFO L225 Difference]: With dead ends: 1262 [2021-07-13 19:49:00,640 INFO L226 Difference]: Without dead ends: 1262 [2021-07-13 19:49:00,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-07-13 19:49:00,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-07-13 19:49:00,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-07-13 19:49:00,652 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-07-13 19:49:00,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:00,652 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-07-13 19:49:00,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-07-13 19:49:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:00,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:00,653 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:00,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4916 [2021-07-13 19:49:00,853 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:00,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1418132912, now seen corresponding path program 429 times [2021-07-13 19:49:00,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:00,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416224464] [2021-07-13 19:49:00,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:00,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:00,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416224464] [2021-07-13 19:49:00,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416224464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:00,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231409559] [2021-07-13 19:49:00,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:01,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:01,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:01,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:01,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231409559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:01,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:01,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998345826] [2021-07-13 19:49:01,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:01,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:01,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:01,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:01,172 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:01,513 INFO L93 Difference]: Finished difference Result 1233 states and 3969 transitions. [2021-07-13 19:49:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:01,516 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:49:01,516 INFO L226 Difference]: Without dead ends: 1219 [2021-07-13 19:49:01,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:01,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-07-13 19:49:01,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 820. [2021-07-13 19:49:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-07-13 19:49:01,527 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-07-13 19:49:01,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:01,527 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-07-13 19:49:01,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:01,527 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-07-13 19:49:01,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:01,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:01,528 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:01,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4925 [2021-07-13 19:49:01,729 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:01,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:01,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1862084004, now seen corresponding path program 430 times [2021-07-13 19:49:01,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:01,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876952488] [2021-07-13 19:49:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:01,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:01,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876952488] [2021-07-13 19:49:01,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876952488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:01,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803641434] [2021-07-13 19:49:01,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:01,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:01,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:01,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803641434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:02,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:02,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570522619] [2021-07-13 19:49:02,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:02,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:02,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:02,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:02,015 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:02,422 INFO L93 Difference]: Finished difference Result 1444 states and 4536 transitions. [2021-07-13 19:49:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:02,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:02,425 INFO L225 Difference]: With dead ends: 1444 [2021-07-13 19:49:02,425 INFO L226 Difference]: Without dead ends: 1444 [2021-07-13 19:49:02,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:02,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-07-13 19:49:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 810. [2021-07-13 19:49:02,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.452410383189122) internal successors, (2793), 809 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2793 transitions. [2021-07-13 19:49:02,436 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2793 transitions. Word has length 20 [2021-07-13 19:49:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:02,437 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2793 transitions. [2021-07-13 19:49:02,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2793 transitions. [2021-07-13 19:49:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:02,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:02,438 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:02,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4933,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:02,638 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:02,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:02,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1250117212, now seen corresponding path program 431 times [2021-07-13 19:49:02,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:02,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729547599] [2021-07-13 19:49:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:02,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:02,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729547599] [2021-07-13 19:49:02,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729547599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34720698] [2021-07-13 19:49:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:02,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:02,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34720698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:02,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:02,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:02,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935712758] [2021-07-13 19:49:02,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:02,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:02,964 INFO L87 Difference]: Start difference. First operand 810 states and 2793 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:03,512 INFO L93 Difference]: Finished difference Result 1475 states and 4621 transitions. [2021-07-13 19:49:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:49:03,512 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:03,515 INFO L225 Difference]: With dead ends: 1475 [2021-07-13 19:49:03,515 INFO L226 Difference]: Without dead ends: 1475 [2021-07-13 19:49:03,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 486.2ms TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:03,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-07-13 19:49:03,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 811. [2021-07-13 19:49:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 3.4555555555555557) internal successors, (2799), 810 states have internal predecessors, (2799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 2799 transitions. [2021-07-13 19:49:03,533 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 2799 transitions. Word has length 20 [2021-07-13 19:49:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:03,533 INFO L482 AbstractCegarLoop]: Abstraction has 811 states and 2799 transitions. [2021-07-13 19:49:03,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 2799 transitions. [2021-07-13 19:49:03,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:03,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:03,534 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:03,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4938,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:03,753 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:03,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1087713128, now seen corresponding path program 432 times [2021-07-13 19:49:03,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:03,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525209159] [2021-07-13 19:49:03,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:03,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525209159] [2021-07-13 19:49:03,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525209159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:03,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425817600] [2021-07-13 19:49:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:03,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:49:03,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:03,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:03,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:04,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425817600] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:04,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:04,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:04,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258158968] [2021-07-13 19:49:04,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:04,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:04,050 INFO L87 Difference]: Start difference. First operand 811 states and 2799 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:04,487 INFO L93 Difference]: Finished difference Result 1432 states and 4518 transitions. [2021-07-13 19:49:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:04,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:04,490 INFO L225 Difference]: With dead ends: 1432 [2021-07-13 19:49:04,490 INFO L226 Difference]: Without dead ends: 1432 [2021-07-13 19:49:04,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:04,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-07-13 19:49:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 807. [2021-07-13 19:49:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.446650124069479) internal successors, (2778), 806 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2778 transitions. [2021-07-13 19:49:04,504 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2778 transitions. Word has length 20 [2021-07-13 19:49:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:04,504 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2778 transitions. [2021-07-13 19:49:04,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2778 transitions. [2021-07-13 19:49:04,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:04,505 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:04,505 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:04,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4945 [2021-07-13 19:49:04,706 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:04,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:04,706 INFO L82 PathProgramCache]: Analyzing trace with hash 688471976, now seen corresponding path program 433 times [2021-07-13 19:49:04,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:04,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623798541] [2021-07-13 19:49:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:04,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:04,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623798541] [2021-07-13 19:49:04,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623798541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:04,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807265593] [2021-07-13 19:49:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:04,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:05,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807265593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:05,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:05,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:05,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530536624] [2021-07-13 19:49:05,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:05,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:05,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:05,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:05,055 INFO L87 Difference]: Start difference. First operand 807 states and 2778 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:05,626 INFO L93 Difference]: Finished difference Result 1355 states and 4261 transitions. [2021-07-13 19:49:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:05,628 INFO L225 Difference]: With dead ends: 1355 [2021-07-13 19:49:05,628 INFO L226 Difference]: Without dead ends: 1348 [2021-07-13 19:49:05,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-07-13 19:49:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 822. [2021-07-13 19:49:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.4470158343483557) internal successors, (2830), 821 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2830 transitions. [2021-07-13 19:49:05,641 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2830 transitions. Word has length 20 [2021-07-13 19:49:05,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:05,641 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2830 transitions. [2021-07-13 19:49:05,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:05,641 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2830 transitions. [2021-07-13 19:49:05,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:05,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:05,642 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:05,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4952,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:05,842 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:05,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:05,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2112083082, now seen corresponding path program 434 times [2021-07-13 19:49:05,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:05,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657444482] [2021-07-13 19:49:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:05,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:05,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:05,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657444482] [2021-07-13 19:49:05,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657444482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:05,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56684634] [2021-07-13 19:49:05,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:06,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:06,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:06,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:06,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:06,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56684634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:06,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:06,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:06,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660483943] [2021-07-13 19:49:06,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:06,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:06,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:06,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:06,139 INFO L87 Difference]: Start difference. First operand 822 states and 2830 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:07,292 INFO L93 Difference]: Finished difference Result 1686 states and 5138 transitions. [2021-07-13 19:49:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:49:07,292 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:07,295 INFO L225 Difference]: With dead ends: 1686 [2021-07-13 19:49:07,295 INFO L226 Difference]: Without dead ends: 1686 [2021-07-13 19:49:07,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1045.1ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:49:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2021-07-13 19:49:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 826. [2021-07-13 19:49:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 3.4545454545454546) internal successors, (2850), 825 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2850 transitions. [2021-07-13 19:49:07,310 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2850 transitions. Word has length 20 [2021-07-13 19:49:07,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:07,311 INFO L482 AbstractCegarLoop]: Abstraction has 826 states and 2850 transitions. [2021-07-13 19:49:07,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2850 transitions. [2021-07-13 19:49:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:07,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:07,312 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:07,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4961,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:07,512 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 688976492, now seen corresponding path program 435 times [2021-07-13 19:49:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:07,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684252362] [2021-07-13 19:49:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:07,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:07,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684252362] [2021-07-13 19:49:07,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684252362] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:07,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733515906] [2021-07-13 19:49:07,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:07,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:07,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733515906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:07,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:07,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:07,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870219455] [2021-07-13 19:49:07,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:07,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:07,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:07,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:07,797 INFO L87 Difference]: Start difference. First operand 826 states and 2850 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:08,274 INFO L93 Difference]: Finished difference Result 1394 states and 4411 transitions. [2021-07-13 19:49:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:49:08,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:08,277 INFO L225 Difference]: With dead ends: 1394 [2021-07-13 19:49:08,277 INFO L226 Difference]: Without dead ends: 1388 [2021-07-13 19:49:08,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-07-13 19:49:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 832. [2021-07-13 19:49:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.441636582430806) internal successors, (2860), 831 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2860 transitions. [2021-07-13 19:49:08,289 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2860 transitions. Word has length 20 [2021-07-13 19:49:08,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:08,289 INFO L482 AbstractCegarLoop]: Abstraction has 832 states and 2860 transitions. [2021-07-13 19:49:08,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:08,289 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2860 transitions. [2021-07-13 19:49:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:08,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:08,291 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:08,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4969 [2021-07-13 19:49:08,491 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:08,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:08,491 INFO L82 PathProgramCache]: Analyzing trace with hash -751966342, now seen corresponding path program 436 times [2021-07-13 19:49:08,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:08,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386357956] [2021-07-13 19:49:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386357956] [2021-07-13 19:49:08,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386357956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463932977] [2021-07-13 19:49:08,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:08,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:08,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:08,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:08,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:08,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463932977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:08,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:08,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:08,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252048473] [2021-07-13 19:49:08,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:08,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:08,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:08,828 INFO L87 Difference]: Start difference. First operand 832 states and 2860 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:09,358 INFO L93 Difference]: Finished difference Result 1356 states and 4269 transitions. [2021-07-13 19:49:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:09,360 INFO L225 Difference]: With dead ends: 1356 [2021-07-13 19:49:09,360 INFO L226 Difference]: Without dead ends: 1356 [2021-07-13 19:49:09,360 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2021-07-13 19:49:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 829. [2021-07-13 19:49:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4444444444444446) internal successors, (2852), 828 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2852 transitions. [2021-07-13 19:49:09,373 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2852 transitions. Word has length 20 [2021-07-13 19:49:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:09,373 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2852 transitions. [2021-07-13 19:49:09,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:09,373 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2852 transitions. [2021-07-13 19:49:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:09,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:09,374 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:09,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4977,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:09,574 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash -496664768, now seen corresponding path program 437 times [2021-07-13 19:49:09,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:09,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286039257] [2021-07-13 19:49:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:09,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:09,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:09,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286039257] [2021-07-13 19:49:09,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286039257] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:09,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853581378] [2021-07-13 19:49:09,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:09,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:09,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853581378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:09,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:09,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563874006] [2021-07-13 19:49:09,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:09,915 INFO L87 Difference]: Start difference. First operand 829 states and 2852 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:10,479 INFO L93 Difference]: Finished difference Result 1314 states and 4162 transitions. [2021-07-13 19:49:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:10,481 INFO L225 Difference]: With dead ends: 1314 [2021-07-13 19:49:10,481 INFO L226 Difference]: Without dead ends: 1307 [2021-07-13 19:49:10,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 582.1ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2021-07-13 19:49:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 833. [2021-07-13 19:49:10,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4447115384615383) internal successors, (2866), 832 states have internal predecessors, (2866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2866 transitions. [2021-07-13 19:49:10,493 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2866 transitions. Word has length 20 [2021-07-13 19:49:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:10,493 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2866 transitions. [2021-07-13 19:49:10,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:10,493 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2866 transitions. [2021-07-13 19:49:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:10,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:10,494 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:10,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4993,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:10,695 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:10,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:10,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1871238056, now seen corresponding path program 438 times [2021-07-13 19:49:10,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:10,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796112220] [2021-07-13 19:49:10,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:10,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796112220] [2021-07-13 19:49:10,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796112220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:10,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356549940] [2021-07-13 19:49:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:10,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:49:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356549940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:11,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:11,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819790378] [2021-07-13 19:49:11,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:11,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:11,044 INFO L87 Difference]: Start difference. First operand 833 states and 2866 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:11,544 INFO L93 Difference]: Finished difference Result 1248 states and 4030 transitions. [2021-07-13 19:49:11,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:11,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:11,546 INFO L225 Difference]: With dead ends: 1248 [2021-07-13 19:49:11,546 INFO L226 Difference]: Without dead ends: 1248 [2021-07-13 19:49:11,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:11,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-07-13 19:49:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 831. [2021-07-13 19:49:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.446987951807229) internal successors, (2861), 830 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2861 transitions. [2021-07-13 19:49:11,558 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2861 transitions. Word has length 20 [2021-07-13 19:49:11,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:11,558 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2861 transitions. [2021-07-13 19:49:11,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2861 transitions. [2021-07-13 19:49:11,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:11,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:11,560 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:11,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5003,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:11,760 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:11,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:11,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1360682644, now seen corresponding path program 439 times [2021-07-13 19:49:11,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:11,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119393625] [2021-07-13 19:49:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:11,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:11,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:11,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119393625] [2021-07-13 19:49:11,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119393625] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:11,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119874834] [2021-07-13 19:49:11,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:11,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:11,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:12,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:12,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119874834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:12,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:12,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:12,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126072263] [2021-07-13 19:49:12,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:12,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:12,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:12,051 INFO L87 Difference]: Start difference. First operand 831 states and 2861 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:12,961 INFO L93 Difference]: Finished difference Result 1564 states and 4857 transitions. [2021-07-13 19:49:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:49:12,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:12,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:12,963 INFO L225 Difference]: With dead ends: 1564 [2021-07-13 19:49:12,963 INFO L226 Difference]: Without dead ends: 1564 [2021-07-13 19:49:12,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 820.9ms TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:49:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2021-07-13 19:49:12,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 822. [2021-07-13 19:49:12,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.451887941534714) internal successors, (2834), 821 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2834 transitions. [2021-07-13 19:49:12,976 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2834 transitions. Word has length 20 [2021-07-13 19:49:12,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:12,976 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2834 transitions. [2021-07-13 19:49:12,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:12,977 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2834 transitions. [2021-07-13 19:49:12,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:12,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:12,978 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:13,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5010 [2021-07-13 19:49:13,178 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash -68340244, now seen corresponding path program 440 times [2021-07-13 19:49:13,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:13,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446937681] [2021-07-13 19:49:13,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:13,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446937681] [2021-07-13 19:49:13,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446937681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:13,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68288698] [2021-07-13 19:49:13,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:13,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:13,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:13,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:13,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68288698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:13,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:13,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:13,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043399792] [2021-07-13 19:49:13,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:13,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:13,473 INFO L87 Difference]: Start difference. First operand 822 states and 2834 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:14,320 INFO L93 Difference]: Finished difference Result 1533 states and 4790 transitions. [2021-07-13 19:49:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:49:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:14,323 INFO L225 Difference]: With dead ends: 1533 [2021-07-13 19:49:14,323 INFO L226 Difference]: Without dead ends: 1533 [2021-07-13 19:49:14,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 764.9ms TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:49:14,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-07-13 19:49:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 821. [2021-07-13 19:49:14,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-07-13 19:49:14,336 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-07-13 19:49:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:14,336 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-07-13 19:49:14,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-07-13 19:49:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:14,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:14,337 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:14,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5018,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:14,538 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:14,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1339946116, now seen corresponding path program 441 times [2021-07-13 19:49:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:14,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672343542] [2021-07-13 19:49:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:14,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672343542] [2021-07-13 19:49:14,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672343542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897093104] [2021-07-13 19:49:14,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:14,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:14,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:14,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897093104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:14,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:14,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:14,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212742816] [2021-07-13 19:49:14,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:14,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:14,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:14,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:14,832 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:15,180 INFO L93 Difference]: Finished difference Result 1278 states and 4121 transitions. [2021-07-13 19:49:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:15,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:15,183 INFO L225 Difference]: With dead ends: 1278 [2021-07-13 19:49:15,183 INFO L226 Difference]: Without dead ends: 1272 [2021-07-13 19:49:15,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 301.3ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-07-13 19:49:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 831. [2021-07-13 19:49:15,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.4397590361445785) internal successors, (2855), 830 states have internal predecessors, (2855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2855 transitions. [2021-07-13 19:49:15,194 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2855 transitions. Word has length 20 [2021-07-13 19:49:15,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:15,194 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2855 transitions. [2021-07-13 19:49:15,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:15,194 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2855 transitions. [2021-07-13 19:49:15,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:15,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:15,196 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:15,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5026,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:15,396 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:15,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1039597254, now seen corresponding path program 442 times [2021-07-13 19:49:15,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:15,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208783398] [2021-07-13 19:49:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:15,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208783398] [2021-07-13 19:49:15,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208783398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:15,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127232307] [2021-07-13 19:49:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:15,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:15,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127232307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:15,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:15,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:15,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112094254] [2021-07-13 19:49:15,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:15,690 INFO L87 Difference]: Start difference. First operand 831 states and 2855 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:16,091 INFO L93 Difference]: Finished difference Result 1369 states and 4359 transitions. [2021-07-13 19:49:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:16,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:16,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:16,093 INFO L225 Difference]: With dead ends: 1369 [2021-07-13 19:49:16,093 INFO L226 Difference]: Without dead ends: 1369 [2021-07-13 19:49:16,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 345.2ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-13 19:49:16,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 821. [2021-07-13 19:49:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.448780487804878) internal successors, (2828), 820 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2828 transitions. [2021-07-13 19:49:16,105 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2828 transitions. Word has length 20 [2021-07-13 19:49:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:16,105 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2828 transitions. [2021-07-13 19:49:16,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2828 transitions. [2021-07-13 19:49:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:16,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:16,106 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:16,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5034 [2021-07-13 19:49:16,307 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -844351768, now seen corresponding path program 443 times [2021-07-13 19:49:16,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:16,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007022295] [2021-07-13 19:49:16,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:16,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:16,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007022295] [2021-07-13 19:49:16,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007022295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253510830] [2021-07-13 19:49:16,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:16,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:16,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:16,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253510830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:16,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:16,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:16,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088334924] [2021-07-13 19:49:16,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:16,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:16,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:16,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:16,650 INFO L87 Difference]: Start difference. First operand 821 states and 2828 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:16,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:16,987 INFO L93 Difference]: Finished difference Result 1227 states and 3962 transitions. [2021-07-13 19:49:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:49:16,987 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:16,989 INFO L225 Difference]: With dead ends: 1227 [2021-07-13 19:49:16,989 INFO L226 Difference]: Without dead ends: 1227 [2021-07-13 19:49:16,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-13 19:49:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 820. [2021-07-13 19:49:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.446886446886447) internal successors, (2823), 819 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2823 transitions. [2021-07-13 19:49:17,000 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2823 transitions. Word has length 20 [2021-07-13 19:49:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:17,000 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2823 transitions. [2021-07-13 19:49:17,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2823 transitions. [2021-07-13 19:49:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:17,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:17,001 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:17,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5041,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:17,202 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash 779986000, now seen corresponding path program 444 times [2021-07-13 19:49:17,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:17,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26821539] [2021-07-13 19:49:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:17,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26821539] [2021-07-13 19:49:17,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26821539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:17,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600028135] [2021-07-13 19:49:17,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:17,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:17,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:17,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:17,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600028135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:17,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:17,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:17,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666855451] [2021-07-13 19:49:17,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:17,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:17,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:17,528 INFO L87 Difference]: Start difference. First operand 820 states and 2823 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:17,864 INFO L93 Difference]: Finished difference Result 1191 states and 3882 transitions. [2021-07-13 19:49:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:49:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:17,866 INFO L225 Difference]: With dead ends: 1191 [2021-07-13 19:49:17,867 INFO L226 Difference]: Without dead ends: 1191 [2021-07-13 19:49:17,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-07-13 19:49:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 804. [2021-07-13 19:49:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-07-13 19:49:17,877 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-07-13 19:49:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:17,877 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-07-13 19:49:17,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:17,877 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-07-13 19:49:17,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:17,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:17,879 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:18,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5052,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,079 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:18,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:18,079 INFO L82 PathProgramCache]: Analyzing trace with hash -766554712, now seen corresponding path program 445 times [2021-07-13 19:49:18,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:18,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113927918] [2021-07-13 19:49:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113927918] [2021-07-13 19:49:18,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113927918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317542253] [2021-07-13 19:49:18,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317542253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:18,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414583401] [2021-07-13 19:49:18,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:18,346 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:18,667 INFO L93 Difference]: Finished difference Result 1123 states and 3609 transitions. [2021-07-13 19:49:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:18,669 INFO L225 Difference]: With dead ends: 1123 [2021-07-13 19:49:18,669 INFO L226 Difference]: Without dead ends: 1123 [2021-07-13 19:49:18,669 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-07-13 19:49:18,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 807. [2021-07-13 19:49:18,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.436724565756824) internal successors, (2770), 806 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2770 transitions. [2021-07-13 19:49:18,680 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2770 transitions. Word has length 20 [2021-07-13 19:49:18,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:18,680 INFO L482 AbstractCegarLoop]: Abstraction has 807 states and 2770 transitions. [2021-07-13 19:49:18,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2770 transitions. [2021-07-13 19:49:18,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:18,681 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:18,681 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:18,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5059,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:18,881 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash -58196494, now seen corresponding path program 446 times [2021-07-13 19:49:18,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:18,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274580889] [2021-07-13 19:49:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:18,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274580889] [2021-07-13 19:49:18,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274580889] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:18,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993541916] [2021-07-13 19:49:18,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:19,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:19,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993541916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612080667] [2021-07-13 19:49:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:19,142 INFO L87 Difference]: Start difference. First operand 807 states and 2770 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:19,750 INFO L93 Difference]: Finished difference Result 1242 states and 3910 transitions. [2021-07-13 19:49:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:49:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:19,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:19,752 INFO L225 Difference]: With dead ends: 1242 [2021-07-13 19:49:19,752 INFO L226 Difference]: Without dead ends: 1242 [2021-07-13 19:49:19,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:49:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-07-13 19:49:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 810. [2021-07-13 19:49:19,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4375772558714464) internal successors, (2781), 809 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2781 transitions. [2021-07-13 19:49:19,764 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2781 transitions. Word has length 20 [2021-07-13 19:49:19,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:19,764 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2781 transitions. [2021-07-13 19:49:19,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:19,764 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2781 transitions. [2021-07-13 19:49:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:19,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:19,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:19,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5061,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:19,965 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1552104216, now seen corresponding path program 447 times [2021-07-13 19:49:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:19,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133791913] [2021-07-13 19:49:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133791913] [2021-07-13 19:49:20,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133791913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185541581] [2021-07-13 19:49:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:20,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:20,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:20,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:20,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185541581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:20,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:20,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044435064] [2021-07-13 19:49:20,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:20,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:20,235 INFO L87 Difference]: Start difference. First operand 810 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:20,608 INFO L93 Difference]: Finished difference Result 1126 states and 3612 transitions. [2021-07-13 19:49:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:20,608 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:20,610 INFO L225 Difference]: With dead ends: 1126 [2021-07-13 19:49:20,610 INFO L226 Difference]: Without dead ends: 1120 [2021-07-13 19:49:20,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 329.6ms TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:20,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-07-13 19:49:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 804. [2021-07-13 19:49:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.439601494396015) internal successors, (2762), 803 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2762 transitions. [2021-07-13 19:49:20,620 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2762 transitions. Word has length 20 [2021-07-13 19:49:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:20,620 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2762 transitions. [2021-07-13 19:49:20,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2762 transitions. [2021-07-13 19:49:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:20,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:20,621 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:20,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5066 [2021-07-13 19:49:20,822 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:20,822 INFO L82 PathProgramCache]: Analyzing trace with hash 635574444, now seen corresponding path program 448 times [2021-07-13 19:49:20,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:20,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560886537] [2021-07-13 19:49:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:20,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:20,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560886537] [2021-07-13 19:49:20,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560886537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:20,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483689559] [2021-07-13 19:49:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:20,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:20,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:20,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:20,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483689559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:21,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:21,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:21,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339409354] [2021-07-13 19:49:21,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:21,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:21,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:21,082 INFO L87 Difference]: Start difference. First operand 804 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:21,369 INFO L93 Difference]: Finished difference Result 1162 states and 3704 transitions. [2021-07-13 19:49:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:21,369 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:21,371 INFO L225 Difference]: With dead ends: 1162 [2021-07-13 19:49:21,371 INFO L226 Difference]: Without dead ends: 1155 [2021-07-13 19:49:21,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 281.9ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2021-07-13 19:49:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 823. [2021-07-13 19:49:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-07-13 19:49:21,391 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-07-13 19:49:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:21,391 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-07-13 19:49:21,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-07-13 19:49:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:21,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:21,393 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:21,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5072,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:21,593 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2129986682, now seen corresponding path program 449 times [2021-07-13 19:49:21,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:21,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854072559] [2021-07-13 19:49:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:21,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:21,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854072559] [2021-07-13 19:49:21,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854072559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:21,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581248939] [2021-07-13 19:49:21,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:21,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:21,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:21,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:21,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581248939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:21,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:21,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:21,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291553140] [2021-07-13 19:49:21,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:21,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:21,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:21,873 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:22,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:22,282 INFO L93 Difference]: Finished difference Result 1164 states and 3708 transitions. [2021-07-13 19:49:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:22,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:22,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:22,284 INFO L225 Difference]: With dead ends: 1164 [2021-07-13 19:49:22,284 INFO L226 Difference]: Without dead ends: 1164 [2021-07-13 19:49:22,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 353.7ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:22,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-07-13 19:49:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 823. [2021-07-13 19:49:22,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.435523114355231) internal successors, (2824), 822 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2824 transitions. [2021-07-13 19:49:22,295 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2824 transitions. Word has length 20 [2021-07-13 19:49:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:22,295 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2824 transitions. [2021-07-13 19:49:22,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2824 transitions. [2021-07-13 19:49:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:22,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:22,296 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:22,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5078 [2021-07-13 19:49:22,497 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash 636078960, now seen corresponding path program 450 times [2021-07-13 19:49:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:22,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907836133] [2021-07-13 19:49:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907836133] [2021-07-13 19:49:22,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907836133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774327496] [2021-07-13 19:49:22,553 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:22,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:49:22,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:22,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774327496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:22,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:22,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:22,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092606807] [2021-07-13 19:49:22,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:22,780 INFO L87 Difference]: Start difference. First operand 823 states and 2824 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:23,220 INFO L93 Difference]: Finished difference Result 1143 states and 3648 transitions. [2021-07-13 19:49:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:23,222 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:49:23,222 INFO L226 Difference]: Without dead ends: 1137 [2021-07-13 19:49:23,222 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 392.6ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-07-13 19:49:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 823. [2021-07-13 19:49:23,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.431873479318735) internal successors, (2821), 822 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2821 transitions. [2021-07-13 19:49:23,233 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2821 transitions. Word has length 20 [2021-07-13 19:49:23,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:23,233 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2821 transitions. [2021-07-13 19:49:23,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:23,233 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2821 transitions. [2021-07-13 19:49:23,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:23,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:23,234 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:23,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5085,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:23,434 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:23,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash -804863874, now seen corresponding path program 451 times [2021-07-13 19:49:23,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:23,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776887081] [2021-07-13 19:49:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:23,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776887081] [2021-07-13 19:49:23,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776887081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567865516] [2021-07-13 19:49:23,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:23,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567865516] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:23,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:23,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:23,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862719945] [2021-07-13 19:49:23,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:23,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:23,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:23,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:23,703 INFO L87 Difference]: Start difference. First operand 823 states and 2821 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:24,027 INFO L93 Difference]: Finished difference Result 1111 states and 3584 transitions. [2021-07-13 19:49:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:24,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:24,029 INFO L225 Difference]: With dead ends: 1111 [2021-07-13 19:49:24,029 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:49:24,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:49:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 820. [2021-07-13 19:49:24,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.4346764346764345) internal successors, (2813), 819 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2813 transitions. [2021-07-13 19:49:24,040 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2813 transitions. Word has length 20 [2021-07-13 19:49:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:24,040 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2813 transitions. [2021-07-13 19:49:24,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2813 transitions. [2021-07-13 19:49:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:24,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:24,041 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:24,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5091 [2021-07-13 19:49:24,258 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:24,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:24,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1173934538, now seen corresponding path program 452 times [2021-07-13 19:49:24,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:24,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763725669] [2021-07-13 19:49:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:24,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:24,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763725669] [2021-07-13 19:49:24,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763725669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806709347] [2021-07-13 19:49:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:24,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:24,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806709347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:24,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:24,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000791171] [2021-07-13 19:49:24,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:24,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:24,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:24,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:24,533 INFO L87 Difference]: Start difference. First operand 820 states and 2813 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:24,903 INFO L93 Difference]: Finished difference Result 1034 states and 3392 transitions. [2021-07-13 19:49:24,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:24,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:24,905 INFO L225 Difference]: With dead ends: 1034 [2021-07-13 19:49:24,905 INFO L226 Difference]: Without dead ends: 1022 [2021-07-13 19:49:24,905 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:24,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-07-13 19:49:24,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 820. [2021-07-13 19:49:24,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.431013431013431) internal successors, (2810), 819 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2810 transitions. [2021-07-13 19:49:24,915 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2810 transitions. Word has length 20 [2021-07-13 19:49:24,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:24,915 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2810 transitions. [2021-07-13 19:49:24,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2810 transitions. [2021-07-13 19:49:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:24,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:24,917 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:25,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5095,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:25,117 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:25,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:25,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1343932662, now seen corresponding path program 453 times [2021-07-13 19:49:25,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:25,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808147314] [2021-07-13 19:49:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:25,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:25,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808147314] [2021-07-13 19:49:25,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808147314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400453306] [2021-07-13 19:49:25,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:25,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:49:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:25,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400453306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:25,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:49:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745081749] [2021-07-13 19:49:25,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:49:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:49:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:49:25,366 INFO L87 Difference]: Start difference. First operand 820 states and 2810 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:25,675 INFO L93 Difference]: Finished difference Result 1048 states and 3431 transitions. [2021-07-13 19:49:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:25,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:25,677 INFO L225 Difference]: With dead ends: 1048 [2021-07-13 19:49:25,677 INFO L226 Difference]: Without dead ends: 1048 [2021-07-13 19:49:25,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:49:25,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-07-13 19:49:25,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 801. [2021-07-13 19:49:25,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-07-13 19:49:25,687 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-07-13 19:49:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:25,687 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-07-13 19:49:25,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-07-13 19:49:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:25,688 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:25,688 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:25,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5102 [2021-07-13 19:49:25,889 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -225239522, now seen corresponding path program 454 times [2021-07-13 19:49:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185053777] [2021-07-13 19:49:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:25,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:25,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185053777] [2021-07-13 19:49:25,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185053777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:25,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763581321] [2021-07-13 19:49:25,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:26,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:26,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:26,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763581321] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:26,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:26,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265497795] [2021-07-13 19:49:26,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:26,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:26,207 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:26,618 INFO L93 Difference]: Finished difference Result 1254 states and 3940 transitions. [2021-07-13 19:49:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:26,620 INFO L225 Difference]: With dead ends: 1254 [2021-07-13 19:49:26,620 INFO L226 Difference]: Without dead ends: 1254 [2021-07-13 19:49:26,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2021-07-13 19:49:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 808. [2021-07-13 19:49:26,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.44361833952912) internal successors, (2779), 807 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2779 transitions. [2021-07-13 19:49:26,631 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2779 transitions. Word has length 20 [2021-07-13 19:49:26,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:26,632 INFO L482 AbstractCegarLoop]: Abstraction has 808 states and 2779 transitions. [2021-07-13 19:49:26,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2779 transitions. [2021-07-13 19:49:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:26,633 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:26,633 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:26,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5104,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:26,833 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:26,833 INFO L82 PathProgramCache]: Analyzing trace with hash 483118696, now seen corresponding path program 455 times [2021-07-13 19:49:26,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:26,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503428298] [2021-07-13 19:49:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:26,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:26,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503428298] [2021-07-13 19:49:26,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503428298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:26,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268092570] [2021-07-13 19:49:26,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:27,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:27,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:27,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:27,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268092570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:27,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:27,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:27,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148608090] [2021-07-13 19:49:27,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:27,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:27,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:27,174 INFO L87 Difference]: Start difference. First operand 808 states and 2779 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:28,005 INFO L93 Difference]: Finished difference Result 1428 states and 4361 transitions. [2021-07-13 19:49:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:49:28,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:28,007 INFO L225 Difference]: With dead ends: 1428 [2021-07-13 19:49:28,007 INFO L226 Difference]: Without dead ends: 1428 [2021-07-13 19:49:28,007 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:49:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-07-13 19:49:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 814. [2021-07-13 19:49:28,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4489544895448954) internal successors, (2804), 813 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2804 transitions. [2021-07-13 19:49:28,020 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2804 transitions. Word has length 20 [2021-07-13 19:49:28,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:28,020 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2804 transitions. [2021-07-13 19:49:28,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,020 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2804 transitions. [2021-07-13 19:49:28,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:28,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:28,021 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:28,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5109,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:28,221 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1010789026, now seen corresponding path program 456 times [2021-07-13 19:49:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:28,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032458507] [2021-07-13 19:49:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:28,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032458507] [2021-07-13 19:49:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032458507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:28,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629433744] [2021-07-13 19:49:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:28,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:28,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:28,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:28,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629433744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:28,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:28,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:28,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971449552] [2021-07-13 19:49:28,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:28,545 INFO L87 Difference]: Start difference. First operand 814 states and 2804 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:28,911 INFO L93 Difference]: Finished difference Result 1190 states and 3778 transitions. [2021-07-13 19:49:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:28,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:28,914 INFO L225 Difference]: With dead ends: 1190 [2021-07-13 19:49:28,914 INFO L226 Difference]: Without dead ends: 1184 [2021-07-13 19:49:28,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2021-07-13 19:49:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 814. [2021-07-13 19:49:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-07-13 19:49:28,925 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-07-13 19:49:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:28,925 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-07-13 19:49:28,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-07-13 19:49:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:28,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:28,926 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:29,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5117,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:29,126 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1686879340, now seen corresponding path program 457 times [2021-07-13 19:49:29,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:29,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758998720] [2021-07-13 19:49:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:29,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:29,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758998720] [2021-07-13 19:49:29,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758998720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:29,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891496679] [2021-07-13 19:49:29,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:29,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:29,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891496679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:29,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:29,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:29,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332427290] [2021-07-13 19:49:29,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:29,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:29,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:29,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:29,430 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:29,824 INFO L93 Difference]: Finished difference Result 1100 states and 3553 transitions. [2021-07-13 19:49:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:29,826 INFO L225 Difference]: With dead ends: 1100 [2021-07-13 19:49:29,826 INFO L226 Difference]: Without dead ends: 1086 [2021-07-13 19:49:29,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:29,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-07-13 19:49:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 814. [2021-07-13 19:49:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 3.4415744157441575) internal successors, (2798), 813 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 2798 transitions. [2021-07-13 19:49:29,836 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 2798 transitions. Word has length 20 [2021-07-13 19:49:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:29,836 INFO L482 AbstractCegarLoop]: Abstraction has 814 states and 2798 transitions. [2021-07-13 19:49:29,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 2798 transitions. [2021-07-13 19:49:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:29,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:29,837 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:30,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5127,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:30,038 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:30,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1593337576, now seen corresponding path program 458 times [2021-07-13 19:49:30,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:30,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281227639] [2021-07-13 19:49:30,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281227639] [2021-07-13 19:49:30,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281227639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627053153] [2021-07-13 19:49:30,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:30,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627053153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:30,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:30,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068524695] [2021-07-13 19:49:30,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:30,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:30,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:30,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:30,344 INFO L87 Difference]: Start difference. First operand 814 states and 2798 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:30,698 INFO L93 Difference]: Finished difference Result 1196 states and 3803 transitions. [2021-07-13 19:49:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:30,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:30,700 INFO L225 Difference]: With dead ends: 1196 [2021-07-13 19:49:30,700 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 19:49:30,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 19:49:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 804. [2021-07-13 19:49:30,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.448318804483188) internal successors, (2769), 803 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2769 transitions. [2021-07-13 19:49:30,711 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2769 transitions. Word has length 20 [2021-07-13 19:49:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:30,711 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2769 transitions. [2021-07-13 19:49:30,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2769 transitions. [2021-07-13 19:49:30,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:30,712 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:30,712 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:30,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5135 [2021-07-13 19:49:30,912 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1518863640, now seen corresponding path program 459 times [2021-07-13 19:49:30,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:30,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072533344] [2021-07-13 19:49:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:30,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:30,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072533344] [2021-07-13 19:49:30,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072533344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:30,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153685918] [2021-07-13 19:49:30,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:31,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:31,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:31,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:31,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153685918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:31,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:31,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853317921] [2021-07-13 19:49:31,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:31,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:31,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:31,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:31,206 INFO L87 Difference]: Start difference. First operand 804 states and 2769 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:31,628 INFO L93 Difference]: Finished difference Result 1208 states and 3832 transitions. [2021-07-13 19:49:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:31,631 INFO L225 Difference]: With dead ends: 1208 [2021-07-13 19:49:31,631 INFO L226 Difference]: Without dead ends: 1208 [2021-07-13 19:49:31,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-07-13 19:49:31,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 805. [2021-07-13 19:49:31,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.451492537313433) internal successors, (2775), 804 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2775 transitions. [2021-07-13 19:49:31,642 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2775 transitions. Word has length 20 [2021-07-13 19:49:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:31,642 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2775 transitions. [2021-07-13 19:49:31,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2775 transitions. [2021-07-13 19:49:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:31,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:31,643 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:31,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5140 [2021-07-13 19:49:31,843 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:31,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:31,844 INFO L82 PathProgramCache]: Analyzing trace with hash 818966700, now seen corresponding path program 460 times [2021-07-13 19:49:31,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:31,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274489397] [2021-07-13 19:49:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:31,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274489397] [2021-07-13 19:49:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274489397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774247853] [2021-07-13 19:49:31,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:32,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:32,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:32,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:32,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774247853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:32,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:32,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:32,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295740086] [2021-07-13 19:49:32,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:32,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:32,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:32,160 INFO L87 Difference]: Start difference. First operand 805 states and 2775 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:32,546 INFO L93 Difference]: Finished difference Result 1175 states and 3755 transitions. [2021-07-13 19:49:32,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:32,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:32,548 INFO L225 Difference]: With dead ends: 1175 [2021-07-13 19:49:32,548 INFO L226 Difference]: Without dead ends: 1175 [2021-07-13 19:49:32,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-13 19:49:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 801. [2021-07-13 19:49:32,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4425) internal successors, (2754), 800 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2754 transitions. [2021-07-13 19:49:32,559 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2754 transitions. Word has length 20 [2021-07-13 19:49:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:32,559 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2754 transitions. [2021-07-13 19:49:32,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2754 transitions. [2021-07-13 19:49:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:32,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:32,560 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:32,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5147,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:32,760 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:32,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1914137786, now seen corresponding path program 461 times [2021-07-13 19:49:32,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:32,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907485493] [2021-07-13 19:49:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:32,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907485493] [2021-07-13 19:49:32,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907485493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593761681] [2021-07-13 19:49:32,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:32,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:32,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:32,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:32,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:33,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593761681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:33,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:33,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:33,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356145306] [2021-07-13 19:49:33,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:33,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:33,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:33,075 INFO L87 Difference]: Start difference. First operand 801 states and 2754 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:33,965 INFO L93 Difference]: Finished difference Result 1432 states and 4400 transitions. [2021-07-13 19:49:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:49:33,965 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:33,974 INFO L225 Difference]: With dead ends: 1432 [2021-07-13 19:49:33,974 INFO L226 Difference]: Without dead ends: 1432 [2021-07-13 19:49:33,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:49:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-07-13 19:49:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 806. [2021-07-13 19:49:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.453416149068323) internal successors, (2780), 805 states have internal predecessors, (2780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2780 transitions. [2021-07-13 19:49:33,987 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2780 transitions. Word has length 20 [2021-07-13 19:49:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:33,987 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2780 transitions. [2021-07-13 19:49:33,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2780 transitions. [2021-07-13 19:49:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:33,988 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:33,988 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:34,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5154 [2021-07-13 19:49:34,189 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -765411196, now seen corresponding path program 462 times [2021-07-13 19:49:34,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:34,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020000920] [2021-07-13 19:49:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020000920] [2021-07-13 19:49:34,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020000920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602268875] [2021-07-13 19:49:34,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:34,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:49:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602268875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:34,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:34,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:34,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825535961] [2021-07-13 19:49:34,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:34,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:34,528 INFO L87 Difference]: Start difference. First operand 806 states and 2780 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:34,954 INFO L93 Difference]: Finished difference Result 1152 states and 3680 transitions. [2021-07-13 19:49:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:49:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:34,956 INFO L225 Difference]: With dead ends: 1152 [2021-07-13 19:49:34,956 INFO L226 Difference]: Without dead ends: 1145 [2021-07-13 19:49:34,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:34,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-07-13 19:49:34,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 818. [2021-07-13 19:49:34,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-07-13 19:49:34,967 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-07-13 19:49:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:34,967 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-07-13 19:49:34,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-07-13 19:49:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:34,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:34,968 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:35,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5161,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:35,169 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1602491628, now seen corresponding path program 463 times [2021-07-13 19:49:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:35,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045160433] [2021-07-13 19:49:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:35,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045160433] [2021-07-13 19:49:35,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045160433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:35,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968713979] [2021-07-13 19:49:35,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:35,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968713979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:35,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:35,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:35,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631165375] [2021-07-13 19:49:35,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:35,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:35,507 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:35,901 INFO L93 Difference]: Finished difference Result 1098 states and 3559 transitions. [2021-07-13 19:49:35,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:35,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:35,904 INFO L225 Difference]: With dead ends: 1098 [2021-07-13 19:49:35,904 INFO L226 Difference]: Without dead ends: 1098 [2021-07-13 19:49:35,904 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2021-07-13 19:49:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 816. [2021-07-13 19:49:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.4478527607361964) internal successors, (2810), 815 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2810 transitions. [2021-07-13 19:49:35,914 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2810 transitions. Word has length 20 [2021-07-13 19:49:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:35,914 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2810 transitions. [2021-07-13 19:49:35,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2810 transitions. [2021-07-13 19:49:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:35,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:35,916 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:36,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5169,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,116 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1629429072, now seen corresponding path program 464 times [2021-07-13 19:49:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87676724] [2021-07-13 19:49:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:36,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:36,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:36,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87676724] [2021-07-13 19:49:36,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87676724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:36,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012622611] [2021-07-13 19:49:36,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:36,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:36,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:36,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012622611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:36,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:36,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:36,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943093120] [2021-07-13 19:49:36,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:36,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:36,419 INFO L87 Difference]: Start difference. First operand 816 states and 2810 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:37,064 INFO L93 Difference]: Finished difference Result 1312 states and 4126 transitions. [2021-07-13 19:49:37,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:49:37,064 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:37,066 INFO L225 Difference]: With dead ends: 1312 [2021-07-13 19:49:37,066 INFO L226 Difference]: Without dead ends: 1312 [2021-07-13 19:49:37,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:49:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1312 states. [2021-07-13 19:49:37,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1312 to 813. [2021-07-13 19:49:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.4433497536945814) internal successors, (2796), 812 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2796 transitions. [2021-07-13 19:49:37,078 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2796 transitions. Word has length 20 [2021-07-13 19:49:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:37,078 INFO L482 AbstractCegarLoop]: Abstraction has 813 states and 2796 transitions. [2021-07-13 19:49:37,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:37,078 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2796 transitions. [2021-07-13 19:49:37,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:37,079 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:37,079 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:37,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5179 [2021-07-13 19:49:37,280 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:37,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash -337086672, now seen corresponding path program 465 times [2021-07-13 19:49:37,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:37,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614720260] [2021-07-13 19:49:37,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:37,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614720260] [2021-07-13 19:49:37,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614720260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:37,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303188856] [2021-07-13 19:49:37,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:37,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:37,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:37,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:37,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303188856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:37,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:37,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:37,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007521096] [2021-07-13 19:49:37,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:37,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:37,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:37,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:37,594 INFO L87 Difference]: Start difference. First operand 813 states and 2796 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:38,269 INFO L93 Difference]: Finished difference Result 1281 states and 4059 transitions. [2021-07-13 19:49:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:49:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:38,271 INFO L225 Difference]: With dead ends: 1281 [2021-07-13 19:49:38,271 INFO L226 Difference]: Without dead ends: 1281 [2021-07-13 19:49:38,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-07-13 19:49:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 812. [2021-07-13 19:49:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-07-13 19:49:38,282 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-07-13 19:49:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:38,283 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-07-13 19:49:38,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-07-13 19:49:38,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:38,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:38,284 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:38,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5187 [2021-07-13 19:49:38,484 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1608692544, now seen corresponding path program 466 times [2021-07-13 19:49:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:38,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492671286] [2021-07-13 19:49:38,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:38,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492671286] [2021-07-13 19:49:38,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492671286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412334678] [2021-07-13 19:49:38,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:38,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:38,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:38,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412334678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:38,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:38,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:38,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382481227] [2021-07-13 19:49:38,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:38,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:38,777 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:39,096 INFO L93 Difference]: Finished difference Result 1105 states and 3580 transitions. [2021-07-13 19:49:39,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:39,097 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:39,098 INFO L225 Difference]: With dead ends: 1105 [2021-07-13 19:49:39,098 INFO L226 Difference]: Without dead ends: 1099 [2021-07-13 19:49:39,099 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:39,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-07-13 19:49:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 822. [2021-07-13 19:49:39,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.433617539585871) internal successors, (2819), 821 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2819 transitions. [2021-07-13 19:49:39,110 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2819 transitions. Word has length 20 [2021-07-13 19:49:39,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:39,110 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2819 transitions. [2021-07-13 19:49:39,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:39,110 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2819 transitions. [2021-07-13 19:49:39,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:39,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:39,111 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:39,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5193 [2021-07-13 19:49:39,311 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash 770850826, now seen corresponding path program 467 times [2021-07-13 19:49:39,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:39,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974328770] [2021-07-13 19:49:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:39,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974328770] [2021-07-13 19:49:39,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974328770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:39,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342729652] [2021-07-13 19:49:39,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:39,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:39,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:39,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342729652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:39,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:39,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:39,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817464588] [2021-07-13 19:49:39,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:39,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:39,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:39,626 INFO L87 Difference]: Start difference. First operand 822 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:40,016 INFO L93 Difference]: Finished difference Result 1200 states and 3828 transitions. [2021-07-13 19:49:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:40,018 INFO L225 Difference]: With dead ends: 1200 [2021-07-13 19:49:40,019 INFO L226 Difference]: Without dead ends: 1200 [2021-07-13 19:49:40,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-07-13 19:49:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 812. [2021-07-13 19:49:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 811 states have (on average 3.4401972872996303) internal successors, (2790), 811 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2790 transitions. [2021-07-13 19:49:40,030 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2790 transitions. Word has length 20 [2021-07-13 19:49:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:40,030 INFO L482 AbstractCegarLoop]: Abstraction has 812 states and 2790 transitions. [2021-07-13 19:49:40,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2790 transitions. [2021-07-13 19:49:40,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:40,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:40,031 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:40,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5201 [2021-07-13 19:49:40,231 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:40,232 INFO L82 PathProgramCache]: Analyzing trace with hash 511239572, now seen corresponding path program 468 times [2021-07-13 19:49:40,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:40,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235935095] [2021-07-13 19:49:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:40,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235935095] [2021-07-13 19:49:40,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235935095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139294380] [2021-07-13 19:49:40,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:40,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:40,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:40,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:40,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:40,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139294380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:40,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:40,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73355998] [2021-07-13 19:49:40,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:40,585 INFO L87 Difference]: Start difference. First operand 812 states and 2790 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:40,861 INFO L93 Difference]: Finished difference Result 1058 states and 3468 transitions. [2021-07-13 19:49:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:40,862 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:40,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:40,863 INFO L225 Difference]: With dead ends: 1058 [2021-07-13 19:49:40,863 INFO L226 Difference]: Without dead ends: 1058 [2021-07-13 19:49:40,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-07-13 19:49:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 800. [2021-07-13 19:49:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.439299123904881) internal successors, (2748), 799 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2748 transitions. [2021-07-13 19:49:40,873 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2748 transitions. Word has length 20 [2021-07-13 19:49:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:40,874 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2748 transitions. [2021-07-13 19:49:40,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:40,874 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2748 transitions. [2021-07-13 19:49:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:40,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:40,875 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:41,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5209 [2021-07-13 19:49:41,075 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:41,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2047493274, now seen corresponding path program 469 times [2021-07-13 19:49:41,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:41,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925683036] [2021-07-13 19:49:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:41,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:41,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925683036] [2021-07-13 19:49:41,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925683036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:41,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366918408] [2021-07-13 19:49:41,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:41,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:41,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:41,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366918408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:41,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:41,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961215606] [2021-07-13 19:49:41,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:41,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:41,393 INFO L87 Difference]: Start difference. First operand 800 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:41,757 INFO L93 Difference]: Finished difference Result 1176 states and 3748 transitions. [2021-07-13 19:49:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:41,757 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:41,759 INFO L225 Difference]: With dead ends: 1176 [2021-07-13 19:49:41,759 INFO L226 Difference]: Without dead ends: 1169 [2021-07-13 19:49:41,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 366.7ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-07-13 19:49:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 821. [2021-07-13 19:49:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-07-13 19:49:41,770 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-07-13 19:49:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:41,770 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-07-13 19:49:41,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-07-13 19:49:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:41,771 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:41,771 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:41,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-07-13 19:49:41,972 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:41,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash -753061784, now seen corresponding path program 470 times [2021-07-13 19:49:41,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:41,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786131633] [2021-07-13 19:49:41,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:42,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786131633] [2021-07-13 19:49:42,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786131633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480188927] [2021-07-13 19:49:42,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:42,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:42,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:42,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:42,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480188927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:42,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:42,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:42,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446771703] [2021-07-13 19:49:42,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:42,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:42,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:42,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:42,302 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:42,875 INFO L93 Difference]: Finished difference Result 1218 states and 3844 transitions. [2021-07-13 19:49:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:42,877 INFO L225 Difference]: With dead ends: 1218 [2021-07-13 19:49:42,877 INFO L226 Difference]: Without dead ends: 1218 [2021-07-13 19:49:42,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:42,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2021-07-13 19:49:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 821. [2021-07-13 19:49:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4414634146341463) internal successors, (2822), 820 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2822 transitions. [2021-07-13 19:49:42,889 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2822 transitions. Word has length 20 [2021-07-13 19:49:42,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:42,889 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2822 transitions. [2021-07-13 19:49:42,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2822 transitions. [2021-07-13 19:49:42,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:42,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:42,890 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:43,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5230 [2021-07-13 19:49:43,091 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:43,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:43,091 INFO L82 PathProgramCache]: Analyzing trace with hash 2047997790, now seen corresponding path program 471 times [2021-07-13 19:49:43,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:43,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310837167] [2021-07-13 19:49:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:43,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:43,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310837167] [2021-07-13 19:49:43,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310837167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064522568] [2021-07-13 19:49:43,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:43,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:43,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:43,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064522568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:43,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:43,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272593159] [2021-07-13 19:49:43,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:43,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:43,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:43,404 INFO L87 Difference]: Start difference. First operand 821 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:44,047 INFO L93 Difference]: Finished difference Result 1143 states and 3655 transitions. [2021-07-13 19:49:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:49:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:44,050 INFO L225 Difference]: With dead ends: 1143 [2021-07-13 19:49:44,050 INFO L226 Difference]: Without dead ends: 1137 [2021-07-13 19:49:44,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-07-13 19:49:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 821. [2021-07-13 19:49:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.4378048780487807) internal successors, (2819), 820 states have internal predecessors, (2819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2819 transitions. [2021-07-13 19:49:44,060 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2819 transitions. Word has length 20 [2021-07-13 19:49:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:44,060 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2819 transitions. [2021-07-13 19:49:44,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2819 transitions. [2021-07-13 19:49:44,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:44,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:44,061 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:44,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5237 [2021-07-13 19:49:44,262 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:44,262 INFO L82 PathProgramCache]: Analyzing trace with hash 607054956, now seen corresponding path program 472 times [2021-07-13 19:49:44,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:44,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654848726] [2021-07-13 19:49:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:44,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:44,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654848726] [2021-07-13 19:49:44,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654848726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:44,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521289991] [2021-07-13 19:49:44,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:44,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:44,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521289991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:44,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:44,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:44,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17415670] [2021-07-13 19:49:44,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:44,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:44,564 INFO L87 Difference]: Start difference. First operand 821 states and 2819 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:44,963 INFO L93 Difference]: Finished difference Result 1125 states and 3628 transitions. [2021-07-13 19:49:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:44,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:44,965 INFO L225 Difference]: With dead ends: 1125 [2021-07-13 19:49:44,965 INFO L226 Difference]: Without dead ends: 1125 [2021-07-13 19:49:44,965 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:49:44,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-07-13 19:49:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 818. [2021-07-13 19:49:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.440636474908201) internal successors, (2811), 817 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2811 transitions. [2021-07-13 19:49:44,976 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2811 transitions. Word has length 20 [2021-07-13 19:49:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:44,976 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2811 transitions. [2021-07-13 19:49:44,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2811 transitions. [2021-07-13 19:49:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:44,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:44,977 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:45,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5245 [2021-07-13 19:49:45,178 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1709113928, now seen corresponding path program 473 times [2021-07-13 19:49:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:45,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949002492] [2021-07-13 19:49:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:45,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949002492] [2021-07-13 19:49:45,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949002492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:45,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128418846] [2021-07-13 19:49:45,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:45,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:45,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:45,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128418846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:45,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:45,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018421182] [2021-07-13 19:49:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:45,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:45,511 INFO L87 Difference]: Start difference. First operand 818 states and 2811 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:46,135 INFO L93 Difference]: Finished difference Result 1046 states and 3427 transitions. [2021-07-13 19:49:46,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:46,137 INFO L225 Difference]: With dead ends: 1046 [2021-07-13 19:49:46,137 INFO L226 Difference]: Without dead ends: 1034 [2021-07-13 19:49:46,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-07-13 19:49:46,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 818. [2021-07-13 19:49:46,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.436964504283966) internal successors, (2808), 817 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2808 transitions. [2021-07-13 19:49:46,155 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2808 transitions. Word has length 20 [2021-07-13 19:49:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:46,155 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2808 transitions. [2021-07-13 19:49:46,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2808 transitions. [2021-07-13 19:49:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:46,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:46,156 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:46,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5252 [2021-07-13 19:49:46,357 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:46,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:46,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1539115804, now seen corresponding path program 474 times [2021-07-13 19:49:46,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:46,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136081827] [2021-07-13 19:49:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:46,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:46,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136081827] [2021-07-13 19:49:46,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136081827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:46,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287009686] [2021-07-13 19:49:46,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:46,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:46,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:46,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:46,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:46,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287009686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:46,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:46,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:49:46,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299181782] [2021-07-13 19:49:46,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:49:46,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:49:46,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:49:46,637 INFO L87 Difference]: Start difference. First operand 818 states and 2808 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:46,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:46,989 INFO L93 Difference]: Finished difference Result 1087 states and 3541 transitions. [2021-07-13 19:49:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:46,991 INFO L225 Difference]: With dead ends: 1087 [2021-07-13 19:49:46,991 INFO L226 Difference]: Without dead ends: 1087 [2021-07-13 19:49:46,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-07-13 19:49:47,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 815. [2021-07-13 19:49:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.43980343980344) internal successors, (2800), 814 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2800 transitions. [2021-07-13 19:49:47,002 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2800 transitions. Word has length 20 [2021-07-13 19:49:47,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:47,002 INFO L482 AbstractCegarLoop]: Abstraction has 815 states and 2800 transitions. [2021-07-13 19:49:47,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,002 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2800 transitions. [2021-07-13 19:49:47,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:47,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:47,003 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:47,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5262 [2021-07-13 19:49:47,203 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:47,204 INFO L82 PathProgramCache]: Analyzing trace with hash -428896924, now seen corresponding path program 475 times [2021-07-13 19:49:47,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:47,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417113938] [2021-07-13 19:49:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:47,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417113938] [2021-07-13 19:49:47,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417113938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924687851] [2021-07-13 19:49:47,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:47,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:47,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924687851] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:47,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:47,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:47,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47077028] [2021-07-13 19:49:47,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:47,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:47,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:47,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:47,516 INFO L87 Difference]: Start difference. First operand 815 states and 2800 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:47,826 INFO L93 Difference]: Finished difference Result 1274 states and 3975 transitions. [2021-07-13 19:49:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:47,826 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:47,828 INFO L225 Difference]: With dead ends: 1274 [2021-07-13 19:49:47,828 INFO L226 Difference]: Without dead ends: 1267 [2021-07-13 19:49:47,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 297.3ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-07-13 19:49:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 823. [2021-07-13 19:49:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 822 states have (on average 3.451338199513382) internal successors, (2837), 822 states have internal predecessors, (2837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 2837 transitions. [2021-07-13 19:49:47,841 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 2837 transitions. Word has length 20 [2021-07-13 19:49:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:47,841 INFO L482 AbstractCegarLoop]: Abstraction has 823 states and 2837 transitions. [2021-07-13 19:49:47,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 2837 transitions. [2021-07-13 19:49:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:47,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:47,842 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:48,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5267 [2021-07-13 19:49:48,043 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1065515314, now seen corresponding path program 476 times [2021-07-13 19:49:48,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:48,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043462953] [2021-07-13 19:49:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:48,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043462953] [2021-07-13 19:49:48,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043462953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091721235] [2021-07-13 19:49:48,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:48,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:48,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:48,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:48,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:48,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091721235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:48,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:48,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:48,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030456932] [2021-07-13 19:49:48,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:48,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:48,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:48,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:48,367 INFO L87 Difference]: Start difference. First operand 823 states and 2837 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:48,972 INFO L93 Difference]: Finished difference Result 1437 states and 4376 transitions. [2021-07-13 19:49:48,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:49:48,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:48,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:48,975 INFO L225 Difference]: With dead ends: 1437 [2021-07-13 19:49:48,975 INFO L226 Difference]: Without dead ends: 1437 [2021-07-13 19:49:48,975 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:49:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-07-13 19:49:48,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 827. [2021-07-13 19:49:48,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.4588377723970942) internal successors, (2857), 826 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2857 transitions. [2021-07-13 19:49:48,988 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2857 transitions. Word has length 20 [2021-07-13 19:49:48,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:48,988 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2857 transitions. [2021-07-13 19:49:48,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2857 transitions. [2021-07-13 19:49:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:48,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:48,989 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:49,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5276 [2021-07-13 19:49:49,190 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:49,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:49,190 INFO L82 PathProgramCache]: Analyzing trace with hash -428392408, now seen corresponding path program 477 times [2021-07-13 19:49:49,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:49,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239255513] [2021-07-13 19:49:49,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:49,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239255513] [2021-07-13 19:49:49,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239255513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:49,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705795435] [2021-07-13 19:49:49,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:49,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:49,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705795435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:49,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:49,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:49,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560945097] [2021-07-13 19:49:49,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:49,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:49,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:49,560 INFO L87 Difference]: Start difference. First operand 827 states and 2857 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:50,130 INFO L93 Difference]: Finished difference Result 1233 states and 3887 transitions. [2021-07-13 19:49:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:49:50,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:50,132 INFO L225 Difference]: With dead ends: 1233 [2021-07-13 19:49:50,132 INFO L226 Difference]: Without dead ends: 1227 [2021-07-13 19:49:50,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:49:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-07-13 19:49:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 833. [2021-07-13 19:49:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 832 states have (on average 3.4459134615384617) internal successors, (2867), 832 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 2867 transitions. [2021-07-13 19:49:50,144 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 2867 transitions. Word has length 20 [2021-07-13 19:49:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:50,144 INFO L482 AbstractCegarLoop]: Abstraction has 833 states and 2867 transitions. [2021-07-13 19:49:50,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 2867 transitions. [2021-07-13 19:49:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:50,145 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:50,145 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:50,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5284 [2021-07-13 19:49:50,345 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1869335242, now seen corresponding path program 478 times [2021-07-13 19:49:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:50,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977553160] [2021-07-13 19:49:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:50,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977553160] [2021-07-13 19:49:50,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977553160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749646343] [2021-07-13 19:49:50,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:50,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:50,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749646343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:50,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:50,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502025201] [2021-07-13 19:49:50,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:50,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:50,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:50,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:50,649 INFO L87 Difference]: Start difference. First operand 833 states and 2867 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:51,029 INFO L93 Difference]: Finished difference Result 1222 states and 3859 transitions. [2021-07-13 19:49:51,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:49:51,029 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:51,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:51,031 INFO L225 Difference]: With dead ends: 1222 [2021-07-13 19:49:51,031 INFO L226 Difference]: Without dead ends: 1222 [2021-07-13 19:49:51,031 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 345.9ms TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:51,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-07-13 19:49:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 827. [2021-07-13 19:49:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.444309927360775) internal successors, (2845), 826 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2845 transitions. [2021-07-13 19:49:51,043 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2845 transitions. Word has length 20 [2021-07-13 19:49:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,043 INFO L482 AbstractCegarLoop]: Abstraction has 827 states and 2845 transitions. [2021-07-13 19:49:51,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2845 transitions. [2021-07-13 19:49:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:51,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:51,044 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:51,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5297 [2021-07-13 19:49:51,245 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1614033668, now seen corresponding path program 479 times [2021-07-13 19:49:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:51,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664676091] [2021-07-13 19:49:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:51,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:51,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664676091] [2021-07-13 19:49:51,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664676091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:51,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607806910] [2021-07-13 19:49:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:51,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:51,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:51,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607806910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871523533] [2021-07-13 19:49:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:51,553 INFO L87 Difference]: Start difference. First operand 827 states and 2845 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:51,956 INFO L93 Difference]: Finished difference Result 1194 states and 3789 transitions. [2021-07-13 19:49:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:51,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:51,959 INFO L225 Difference]: With dead ends: 1194 [2021-07-13 19:49:51,959 INFO L226 Difference]: Without dead ends: 1187 [2021-07-13 19:49:51,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-07-13 19:49:51,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 831. [2021-07-13 19:49:51,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.444578313253012) internal successors, (2859), 830 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2859 transitions. [2021-07-13 19:49:51,970 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2859 transitions. Word has length 20 [2021-07-13 19:49:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:51,970 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2859 transitions. [2021-07-13 19:49:51,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2859 transitions. [2021-07-13 19:49:51,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:51,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:51,971 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:52,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5305,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,172 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:52,172 INFO L82 PathProgramCache]: Analyzing trace with hash 753869156, now seen corresponding path program 480 times [2021-07-13 19:49:52,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:52,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115601350] [2021-07-13 19:49:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:52,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115601350] [2021-07-13 19:49:52,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115601350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806878085] [2021-07-13 19:49:52,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:52,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:52,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:52,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:52,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806878085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:52,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:52,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664801473] [2021-07-13 19:49:52,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:52,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:52,465 INFO L87 Difference]: Start difference. First operand 831 states and 2859 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:52,751 INFO L93 Difference]: Finished difference Result 1116 states and 3627 transitions. [2021-07-13 19:49:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:49:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:52,753 INFO L225 Difference]: With dead ends: 1116 [2021-07-13 19:49:52,753 INFO L226 Difference]: Without dead ends: 1116 [2021-07-13 19:49:52,753 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 295.9ms TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:49:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-13 19:49:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 829. [2021-07-13 19:49:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4468599033816427) internal successors, (2854), 828 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2854 transitions. [2021-07-13 19:49:52,764 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2854 transitions. Word has length 20 [2021-07-13 19:49:52,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:52,764 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2854 transitions. [2021-07-13 19:49:52,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2854 transitions. [2021-07-13 19:49:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:52,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:52,765 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:52,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5312,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:52,966 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1816915752, now seen corresponding path program 481 times [2021-07-13 19:49:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:52,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014049968] [2021-07-13 19:49:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014049968] [2021-07-13 19:49:53,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014049968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041205256] [2021-07-13 19:49:53,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:53,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041205256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:53,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:53,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:53,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652433350] [2021-07-13 19:49:53,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:53,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:53,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:53,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:53,313 INFO L87 Difference]: Start difference. First operand 829 states and 2854 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:53,846 INFO L93 Difference]: Finished difference Result 1262 states and 3969 transitions. [2021-07-13 19:49:53,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:53,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:53,848 INFO L225 Difference]: With dead ends: 1262 [2021-07-13 19:49:53,848 INFO L226 Difference]: Without dead ends: 1262 [2021-07-13 19:49:53,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:53,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2021-07-13 19:49:53,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 820. [2021-07-13 19:49:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.451770451770452) internal successors, (2827), 819 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2827 transitions. [2021-07-13 19:49:53,861 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2827 transitions. Word has length 20 [2021-07-13 19:49:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:53,861 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2827 transitions. [2021-07-13 19:49:53,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2827 transitions. [2021-07-13 19:49:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:53,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:53,862 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:54,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-07-13 19:49:54,062 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:54,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:54,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1185709144, now seen corresponding path program 482 times [2021-07-13 19:49:54,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:54,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426201650] [2021-07-13 19:49:54,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:54,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:54,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426201650] [2021-07-13 19:49:54,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426201650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:54,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682503068] [2021-07-13 19:49:54,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:54,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:49:54,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:54,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:54,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:54,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:54,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682503068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:54,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:54,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:54,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870843848] [2021-07-13 19:49:54,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:54,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:54,404 INFO L87 Difference]: Start difference. First operand 820 states and 2827 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:54,887 INFO L93 Difference]: Finished difference Result 1225 states and 3887 transitions. [2021-07-13 19:49:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:54,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:54,890 INFO L225 Difference]: With dead ends: 1225 [2021-07-13 19:49:54,890 INFO L226 Difference]: Without dead ends: 1225 [2021-07-13 19:49:54,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 468.8ms TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:49:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2021-07-13 19:49:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 819. [2021-07-13 19:49:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-07-13 19:49:54,901 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-07-13 19:49:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:54,901 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-07-13 19:49:54,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-07-13 19:49:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:54,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:54,902 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:55,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5336,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:55,103 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1837652280, now seen corresponding path program 483 times [2021-07-13 19:49:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:55,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660773344] [2021-07-13 19:49:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660773344] [2021-07-13 19:49:55,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660773344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138853376] [2021-07-13 19:49:55,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:55,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:49:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:55,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138853376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:55,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:55,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:55,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805967467] [2021-07-13 19:49:55,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:55,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:55,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:55,426 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:55,874 INFO L93 Difference]: Finished difference Result 1133 states and 3646 transitions. [2021-07-13 19:49:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:55,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:55,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:55,877 INFO L225 Difference]: With dead ends: 1133 [2021-07-13 19:49:55,877 INFO L226 Difference]: Without dead ends: 1127 [2021-07-13 19:49:55,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-07-13 19:49:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 829. [2021-07-13 19:49:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.4396135265700485) internal successors, (2848), 828 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2848 transitions. [2021-07-13 19:49:55,888 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2848 transitions. Word has length 20 [2021-07-13 19:49:55,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:55,888 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2848 transitions. [2021-07-13 19:49:55,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2848 transitions. [2021-07-13 19:49:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:55,889 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:55,889 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:56,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5350 [2021-07-13 19:49:56,090 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash -77771646, now seen corresponding path program 484 times [2021-07-13 19:49:56,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:56,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429305985] [2021-07-13 19:49:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:56,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:56,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429305985] [2021-07-13 19:49:56,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429305985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:56,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417418631] [2021-07-13 19:49:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:56,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:49:56,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:56,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:56,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417418631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:56,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:56,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:56,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963768403] [2021-07-13 19:49:56,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:56,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:56,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:56,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:56,417 INFO L87 Difference]: Start difference. First operand 829 states and 2848 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:56,875 INFO L93 Difference]: Finished difference Result 1232 states and 3904 transitions. [2021-07-13 19:49:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:49:56,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:56,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:56,877 INFO L225 Difference]: With dead ends: 1232 [2021-07-13 19:49:56,877 INFO L226 Difference]: Without dead ends: 1232 [2021-07-13 19:49:56,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:49:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-07-13 19:49:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 819. [2021-07-13 19:49:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.4486552567237165) internal successors, (2821), 818 states have internal predecessors, (2821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2821 transitions. [2021-07-13 19:49:56,889 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2821 transitions. Word has length 20 [2021-07-13 19:49:56,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:56,889 INFO L482 AbstractCegarLoop]: Abstraction has 819 states and 2821 transitions. [2021-07-13 19:49:56,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:56,889 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2821 transitions. [2021-07-13 19:49:56,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:56,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:56,890 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:57,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5360,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,090 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:57,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:57,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1961720668, now seen corresponding path program 485 times [2021-07-13 19:49:57,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:57,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179791704] [2021-07-13 19:49:57,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:57,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179791704] [2021-07-13 19:49:57,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179791704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:57,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910548701] [2021-07-13 19:49:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:49:57,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:57,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:57,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910548701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:57,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:57,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724635646] [2021-07-13 19:49:57,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:57,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:57,402 INFO L87 Difference]: Start difference. First operand 819 states and 2821 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:57,734 INFO L93 Difference]: Finished difference Result 1162 states and 3733 transitions. [2021-07-13 19:49:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:49:57,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:57,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:57,736 INFO L225 Difference]: With dead ends: 1162 [2021-07-13 19:49:57,736 INFO L226 Difference]: Without dead ends: 1162 [2021-07-13 19:49:57,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-07-13 19:49:57,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 822. [2021-07-13 19:49:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.454323995127893) internal successors, (2836), 821 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2836 transitions. [2021-07-13 19:49:57,747 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2836 transitions. Word has length 20 [2021-07-13 19:49:57,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:57,748 INFO L482 AbstractCegarLoop]: Abstraction has 822 states and 2836 transitions. [2021-07-13 19:49:57,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2836 transitions. [2021-07-13 19:49:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:57,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:57,749 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:57,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5370,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:57,949 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:57,949 INFO L82 PathProgramCache]: Analyzing trace with hash -337382900, now seen corresponding path program 486 times [2021-07-13 19:49:57,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:57,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141884994] [2021-07-13 19:49:57,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:58,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141884994] [2021-07-13 19:49:58,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141884994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945822005] [2021-07-13 19:49:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:58,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:49:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:49:58,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945822005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:58,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:58,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373037067] [2021-07-13 19:49:58,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:58,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:58,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:58,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:58,246 INFO L87 Difference]: Start difference. First operand 822 states and 2836 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:58,540 INFO L93 Difference]: Finished difference Result 1126 states and 3653 transitions. [2021-07-13 19:49:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:49:58,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:58,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:58,542 INFO L225 Difference]: With dead ends: 1126 [2021-07-13 19:49:58,542 INFO L226 Difference]: Without dead ends: 1126 [2021-07-13 19:49:58,542 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 300.0ms TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:49:58,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-07-13 19:49:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 818. [2021-07-13 19:49:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-07-13 19:49:58,553 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-07-13 19:49:58,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:58,553 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-07-13 19:49:58,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:58,554 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-07-13 19:49:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:58,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:58,555 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:49:58,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5378,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:58,755 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:49:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:49:58,755 INFO L82 PathProgramCache]: Analyzing trace with hash -181205336, now seen corresponding path program 487 times [2021-07-13 19:49:58,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:49:58,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130470139] [2021-07-13 19:49:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:49:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:58,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:49:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130470139] [2021-07-13 19:49:58,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130470139] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:58,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490399181] [2021-07-13 19:49:58,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:49:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:49:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:49:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:49:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:49:59,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490399181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:49:59,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:49:59,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:49:59,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182321320] [2021-07-13 19:49:59,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:49:59,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:49:59,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:49:59,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:49:59,088 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,456 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-07-13 19:49:59,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:49:59,858 INFO L93 Difference]: Finished difference Result 1040 states and 3418 transitions. [2021-07-13 19:49:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:49:59,859 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:49:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:49:59,860 INFO L225 Difference]: With dead ends: 1040 [2021-07-13 19:49:59,860 INFO L226 Difference]: Without dead ends: 1028 [2021-07-13 19:49:59,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:49:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-07-13 19:49:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 820. [2021-07-13 19:49:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.445665445665446) internal successors, (2822), 819 states have internal predecessors, (2822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2822 transitions. [2021-07-13 19:49:59,870 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2822 transitions. Word has length 20 [2021-07-13 19:49:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:49:59,871 INFO L482 AbstractCegarLoop]: Abstraction has 820 states and 2822 transitions. [2021-07-13 19:49:59,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:49:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2822 transitions. [2021-07-13 19:49:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:49:59,872 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:49:59,872 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:00,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5386,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:00,072 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:00,072 INFO L82 PathProgramCache]: Analyzing trace with hash 570195102, now seen corresponding path program 488 times [2021-07-13 19:50:00,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:00,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690345548] [2021-07-13 19:50:00,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:00,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:00,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690345548] [2021-07-13 19:50:00,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690345548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:00,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670472018] [2021-07-13 19:50:00,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:00,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:00,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670472018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:00,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:00,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:00,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291486214] [2021-07-13 19:50:00,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:00,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:00,390 INFO L87 Difference]: Start difference. First operand 820 states and 2822 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:00,965 INFO L93 Difference]: Finished difference Result 1065 states and 3470 transitions. [2021-07-13 19:50:00,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:00,966 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:00,967 INFO L225 Difference]: With dead ends: 1065 [2021-07-13 19:50:00,968 INFO L226 Difference]: Without dead ends: 1059 [2021-07-13 19:50:00,968 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-07-13 19:50:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 830. [2021-07-13 19:50:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.436670687575392) internal successors, (2849), 829 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2849 transitions. [2021-07-13 19:50:00,978 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2849 transitions. Word has length 20 [2021-07-13 19:50:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:00,979 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2849 transitions. [2021-07-13 19:50:00,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2849 transitions. [2021-07-13 19:50:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:00,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:00,980 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:01,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5393 [2021-07-13 19:50:01,180 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1345228824, now seen corresponding path program 489 times [2021-07-13 19:50:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:01,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055505226] [2021-07-13 19:50:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055505226] [2021-07-13 19:50:01,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055505226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178787977] [2021-07-13 19:50:01,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:01,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:01,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:01,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:01,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178787977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:01,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:01,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:01,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907743521] [2021-07-13 19:50:01,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:01,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:01,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:01,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:01,512 INFO L87 Difference]: Start difference. First operand 830 states and 2849 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:02,129 INFO L93 Difference]: Finished difference Result 1158 states and 3713 transitions. [2021-07-13 19:50:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:02,131 INFO L225 Difference]: With dead ends: 1158 [2021-07-13 19:50:02,131 INFO L226 Difference]: Without dead ends: 1158 [2021-07-13 19:50:02,132 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-07-13 19:50:02,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 818. [2021-07-13 19:50:02,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.445532435740514) internal successors, (2815), 817 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2815 transitions. [2021-07-13 19:50:02,143 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2815 transitions. Word has length 20 [2021-07-13 19:50:02,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:02,143 INFO L482 AbstractCegarLoop]: Abstraction has 818 states and 2815 transitions. [2021-07-13 19:50:02,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2815 transitions. [2021-07-13 19:50:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:02,144 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:02,144 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:02,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5401,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:02,345 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -108096714, now seen corresponding path program 490 times [2021-07-13 19:50:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:02,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610557962] [2021-07-13 19:50:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:02,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:02,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610557962] [2021-07-13 19:50:02,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610557962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:02,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109520425] [2021-07-13 19:50:02,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:02,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:02,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:02,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109520425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:02,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:02,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:02,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141553487] [2021-07-13 19:50:02,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:02,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:02,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:02,637 INFO L87 Difference]: Start difference. First operand 818 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:03,028 INFO L93 Difference]: Finished difference Result 1075 states and 3518 transitions. [2021-07-13 19:50:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:03,028 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:03,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:03,030 INFO L225 Difference]: With dead ends: 1075 [2021-07-13 19:50:03,030 INFO L226 Difference]: Without dead ends: 1075 [2021-07-13 19:50:03,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 383.9ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:03,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-07-13 19:50:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 817. [2021-07-13 19:50:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.4473039215686274) internal successors, (2813), 816 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2813 transitions. [2021-07-13 19:50:03,041 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2813 transitions. Word has length 20 [2021-07-13 19:50:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:03,041 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2813 transitions. [2021-07-13 19:50:03,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2813 transitions. [2021-07-13 19:50:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:03,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:03,043 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:03,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5413 [2021-07-13 19:50:03,243 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 643303724, now seen corresponding path program 491 times [2021-07-13 19:50:03,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:03,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248771458] [2021-07-13 19:50:03,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:03,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248771458] [2021-07-13 19:50:03,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248771458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:03,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96984524] [2021-07-13 19:50:03,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:03,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:50:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:03,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96984524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:03,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:03,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:03,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647480623] [2021-07-13 19:50:03,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:03,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:03,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:03,545 INFO L87 Difference]: Start difference. First operand 817 states and 2813 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:03,863 INFO L93 Difference]: Finished difference Result 1095 states and 3557 transitions. [2021-07-13 19:50:03,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:03,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:03,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:03,865 INFO L225 Difference]: With dead ends: 1095 [2021-07-13 19:50:03,865 INFO L226 Difference]: Without dead ends: 1095 [2021-07-13 19:50:03,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:03,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2021-07-13 19:50:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 816. [2021-07-13 19:50:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.445398773006135) internal successors, (2808), 815 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2808 transitions. [2021-07-13 19:50:03,876 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2808 transitions. Word has length 20 [2021-07-13 19:50:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:03,876 INFO L482 AbstractCegarLoop]: Abstraction has 816 states and 2808 transitions. [2021-07-13 19:50:03,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2808 transitions. [2021-07-13 19:50:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:03,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:03,877 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:04,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5418,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:04,077 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2027325804, now seen corresponding path program 492 times [2021-07-13 19:50:04,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:04,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474425066] [2021-07-13 19:50:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:04,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474425066] [2021-07-13 19:50:04,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474425066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:04,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141911] [2021-07-13 19:50:04,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:04,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:50:04,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:04,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:04,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:04,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:04,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011175997] [2021-07-13 19:50:04,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:04,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:04,420 INFO L87 Difference]: Start difference. First operand 816 states and 2808 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:04,784 INFO L93 Difference]: Finished difference Result 1053 states and 3462 transitions. [2021-07-13 19:50:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:04,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:04,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:04,786 INFO L225 Difference]: With dead ends: 1053 [2021-07-13 19:50:04,786 INFO L226 Difference]: Without dead ends: 1053 [2021-07-13 19:50:04,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-07-13 19:50:04,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 797. [2021-07-13 19:50:04,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-07-13 19:50:04,797 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-07-13 19:50:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-07-13 19:50:04,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:04,797 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-07-13 19:50:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:04,798 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:04,798 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:04,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5425,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:04,999 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:04,999 INFO L82 PathProgramCache]: Analyzing trace with hash 432548454, now seen corresponding path program 493 times [2021-07-13 19:50:04,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:04,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908764079] [2021-07-13 19:50:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:05,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:05,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908764079] [2021-07-13 19:50:05,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908764079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859663323] [2021-07-13 19:50:05,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:05,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:05,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859663323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:05,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:05,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:50:05,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45590351] [2021-07-13 19:50:05,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:50:05,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:50:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:05,235 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:05,578 INFO L93 Difference]: Finished difference Result 1260 states and 3974 transitions. [2021-07-13 19:50:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:05,580 INFO L225 Difference]: With dead ends: 1260 [2021-07-13 19:50:05,580 INFO L226 Difference]: Without dead ends: 1260 [2021-07-13 19:50:05,580 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2021-07-13 19:50:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 797. [2021-07-13 19:50:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4321608040201004) internal successors, (2732), 796 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2732 transitions. [2021-07-13 19:50:05,592 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2732 transitions. Word has length 20 [2021-07-13 19:50:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:05,592 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2732 transitions. [2021-07-13 19:50:05,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:05,592 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2732 transitions. [2021-07-13 19:50:05,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:05,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:05,593 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:05,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5433,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,794 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:05,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1990759516, now seen corresponding path program 494 times [2021-07-13 19:50:05,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:05,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662209886] [2021-07-13 19:50:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:05,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662209886] [2021-07-13 19:50:05,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662209886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:05,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658400771] [2021-07-13 19:50:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:05,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:05,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:05,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:06,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:06,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658400771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:06,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:06,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:06,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399914428] [2021-07-13 19:50:06,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:06,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:06,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:06,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:06,045 INFO L87 Difference]: Start difference. First operand 797 states and 2732 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:06,668 INFO L93 Difference]: Finished difference Result 1403 states and 4327 transitions. [2021-07-13 19:50:06,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:50:06,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:06,671 INFO L225 Difference]: With dead ends: 1403 [2021-07-13 19:50:06,671 INFO L226 Difference]: Without dead ends: 1403 [2021-07-13 19:50:06,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-07-13 19:50:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 803. [2021-07-13 19:50:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.4301745635910224) internal successors, (2751), 802 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:06,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2751 transitions. [2021-07-13 19:50:06,683 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2751 transitions. Word has length 20 [2021-07-13 19:50:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:06,683 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2751 transitions. [2021-07-13 19:50:06,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2751 transitions. [2021-07-13 19:50:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:06,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:06,684 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:06,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5437,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:06,885 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:06,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1595849562, now seen corresponding path program 495 times [2021-07-13 19:50:06,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:06,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092115369] [2021-07-13 19:50:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:06,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:06,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092115369] [2021-07-13 19:50:06,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092115369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:06,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77117807] [2021-07-13 19:50:06,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:07,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:07,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77117807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368878000] [2021-07-13 19:50:07,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:07,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:07,171 INFO L87 Difference]: Start difference. First operand 803 states and 2751 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:08,386 INFO L93 Difference]: Finished difference Result 1586 states and 4789 transitions. [2021-07-13 19:50:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:50:08,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:08,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:08,389 INFO L225 Difference]: With dead ends: 1586 [2021-07-13 19:50:08,389 INFO L226 Difference]: Without dead ends: 1586 [2021-07-13 19:50:08,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1098.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:50:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2021-07-13 19:50:08,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 798. [2021-07-13 19:50:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4429109159347555) internal successors, (2744), 797 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2744 transitions. [2021-07-13 19:50:08,404 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2744 transitions. Word has length 20 [2021-07-13 19:50:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:08,404 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2744 transitions. [2021-07-13 19:50:08,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2744 transitions. [2021-07-13 19:50:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:08,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:08,405 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:08,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5441,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:08,606 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash 655741044, now seen corresponding path program 496 times [2021-07-13 19:50:08,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:08,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917430124] [2021-07-13 19:50:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:08,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917430124] [2021-07-13 19:50:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917430124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154079915] [2021-07-13 19:50:08,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:08,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:08,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:08,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:08,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:08,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154079915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:08,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:08,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:08,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017916402] [2021-07-13 19:50:08,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:08,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:08,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:08,921 INFO L87 Difference]: Start difference. First operand 798 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:09,467 INFO L93 Difference]: Finished difference Result 1322 states and 4159 transitions. [2021-07-13 19:50:09,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:09,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:09,470 INFO L225 Difference]: With dead ends: 1322 [2021-07-13 19:50:09,470 INFO L226 Difference]: Without dead ends: 1297 [2021-07-13 19:50:09,470 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:50:09,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-07-13 19:50:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 798. [2021-07-13 19:50:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.437892095357591) internal successors, (2740), 797 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2740 transitions. [2021-07-13 19:50:09,481 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2740 transitions. Word has length 20 [2021-07-13 19:50:09,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:09,481 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2740 transitions. [2021-07-13 19:50:09,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:09,482 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2740 transitions. [2021-07-13 19:50:09,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:09,483 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:09,483 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:09,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5449,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:09,683 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:09,683 INFO L82 PathProgramCache]: Analyzing trace with hash 40903004, now seen corresponding path program 497 times [2021-07-13 19:50:09,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:09,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383450565] [2021-07-13 19:50:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:09,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:09,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383450565] [2021-07-13 19:50:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383450565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013655932] [2021-07-13 19:50:09,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:09,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:09,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:09,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:10,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013655932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:10,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:10,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:10,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841950284] [2021-07-13 19:50:10,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:10,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:10,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:10,030 INFO L87 Difference]: Start difference. First operand 798 states and 2740 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,394 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 19:50:10,521 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-07-13 19:50:10,638 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 19:50:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:10,714 INFO L93 Difference]: Finished difference Result 1271 states and 4059 transitions. [2021-07-13 19:50:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:10,716 INFO L225 Difference]: With dead ends: 1271 [2021-07-13 19:50:10,716 INFO L226 Difference]: Without dead ends: 1271 [2021-07-13 19:50:10,716 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-07-13 19:50:10,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 792. [2021-07-13 19:50:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-07-13 19:50:10,727 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-07-13 19:50:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:10,727 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-07-13 19:50:10,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-07-13 19:50:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:10,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:10,729 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:10,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5456,526 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:10,929 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash 973863644, now seen corresponding path program 498 times [2021-07-13 19:50:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:10,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514772910] [2021-07-13 19:50:10,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:10,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:10,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514772910] [2021-07-13 19:50:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514772910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903783436] [2021-07-13 19:50:10,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:11,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:11,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:11,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:11,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:11,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903783436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:11,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:11,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:11,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256335946] [2021-07-13 19:50:11,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:11,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:11,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:11,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:11,189 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:11,547 INFO L93 Difference]: Finished difference Result 1401 states and 4368 transitions. [2021-07-13 19:50:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:11,549 INFO L225 Difference]: With dead ends: 1401 [2021-07-13 19:50:11,549 INFO L226 Difference]: Without dead ends: 1401 [2021-07-13 19:50:11,549 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:11,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2021-07-13 19:50:11,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 798. [2021-07-13 19:50:11,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4466750313676284) internal successors, (2747), 797 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2747 transitions. [2021-07-13 19:50:11,561 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2747 transitions. Word has length 20 [2021-07-13 19:50:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:11,561 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2747 transitions. [2021-07-13 19:50:11,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:11,561 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2747 transitions. [2021-07-13 19:50:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:11,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:11,562 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:11,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5463 [2021-07-13 19:50:11,763 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:11,763 INFO L82 PathProgramCache]: Analyzing trace with hash 58849244, now seen corresponding path program 499 times [2021-07-13 19:50:11,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:11,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703881523] [2021-07-13 19:50:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:11,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:11,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:11,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703881523] [2021-07-13 19:50:11,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703881523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:11,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887536774] [2021-07-13 19:50:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887536774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:12,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:12,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759904376] [2021-07-13 19:50:12,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:12,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:12,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:12,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:12,057 INFO L87 Difference]: Start difference. First operand 798 states and 2747 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:12,409 INFO L93 Difference]: Finished difference Result 1325 states and 4183 transitions. [2021-07-13 19:50:12,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:12,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:12,411 INFO L225 Difference]: With dead ends: 1325 [2021-07-13 19:50:12,411 INFO L226 Difference]: Without dead ends: 1325 [2021-07-13 19:50:12,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:50:12,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-07-13 19:50:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 801. [2021-07-13 19:50:12,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.4525) internal successors, (2762), 800 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2762 transitions. [2021-07-13 19:50:12,424 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2762 transitions. Word has length 20 [2021-07-13 19:50:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:12,424 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2762 transitions. [2021-07-13 19:50:12,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:12,424 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2762 transitions. [2021-07-13 19:50:12,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:12,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:12,425 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:12,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5468,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:12,626 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:12,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:12,626 INFO L82 PathProgramCache]: Analyzing trace with hash -707996904, now seen corresponding path program 500 times [2021-07-13 19:50:12,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:12,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581172940] [2021-07-13 19:50:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581172940] [2021-07-13 19:50:12,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581172940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501482312] [2021-07-13 19:50:12,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:12,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:12,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:12,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:12,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:12,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:12,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501482312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:12,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:12,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:12,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153800305] [2021-07-13 19:50:12,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:12,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:12,912 INFO L87 Difference]: Start difference. First operand 801 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:13,393 INFO L93 Difference]: Finished difference Result 1357 states and 4264 transitions. [2021-07-13 19:50:13,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:13,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:13,396 INFO L225 Difference]: With dead ends: 1357 [2021-07-13 19:50:13,396 INFO L226 Difference]: Without dead ends: 1357 [2021-07-13 19:50:13,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2021-07-13 19:50:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 802. [2021-07-13 19:50:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4556803995006242) internal successors, (2768), 801 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2768 transitions. [2021-07-13 19:50:13,408 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2768 transitions. Word has length 20 [2021-07-13 19:50:13,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:13,410 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2768 transitions. [2021-07-13 19:50:13,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2768 transitions. [2021-07-13 19:50:13,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:13,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:13,411 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:13,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5472,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:13,611 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1629833436, now seen corresponding path program 501 times [2021-07-13 19:50:13,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:13,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143425218] [2021-07-13 19:50:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:13,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:13,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143425218] [2021-07-13 19:50:13,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143425218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:13,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629842394] [2021-07-13 19:50:13,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:13,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:13,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:13,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:13,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629842394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:13,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:13,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:13,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942479497] [2021-07-13 19:50:13,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:13,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:13,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:13,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:13,933 INFO L87 Difference]: Start difference. First operand 802 states and 2768 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:14,297 INFO L93 Difference]: Finished difference Result 1324 states and 4187 transitions. [2021-07-13 19:50:14,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:14,297 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:14,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:14,299 INFO L225 Difference]: With dead ends: 1324 [2021-07-13 19:50:14,299 INFO L226 Difference]: Without dead ends: 1324 [2021-07-13 19:50:14,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 317.6ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:50:14,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2021-07-13 19:50:14,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 792. [2021-07-13 19:50:14,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4424778761061945) internal successors, (2723), 791 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2723 transitions. [2021-07-13 19:50:14,319 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2723 transitions. Word has length 20 [2021-07-13 19:50:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:14,319 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2723 transitions. [2021-07-13 19:50:14,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2723 transitions. [2021-07-13 19:50:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:14,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:14,321 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:14,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5478,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:14,521 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:14,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:14,522 INFO L82 PathProgramCache]: Analyzing trace with hash 819892878, now seen corresponding path program 502 times [2021-07-13 19:50:14,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:14,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376114539] [2021-07-13 19:50:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376114539] [2021-07-13 19:50:14,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376114539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075502095] [2021-07-13 19:50:14,594 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:14,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:14,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:14,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:14,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:14,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075502095] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:14,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:14,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:14,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325928710] [2021-07-13 19:50:14,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:14,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:14,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:14,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:14,811 INFO L87 Difference]: Start difference. First operand 792 states and 2723 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:15,440 INFO L93 Difference]: Finished difference Result 1452 states and 4481 transitions. [2021-07-13 19:50:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:50:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:15,443 INFO L225 Difference]: With dead ends: 1452 [2021-07-13 19:50:15,443 INFO L226 Difference]: Without dead ends: 1452 [2021-07-13 19:50:15,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:50:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2021-07-13 19:50:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 799. [2021-07-13 19:50:15,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.443609022556391) internal successors, (2748), 798 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2748 transitions. [2021-07-13 19:50:15,465 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2748 transitions. Word has length 20 [2021-07-13 19:50:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:15,465 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2748 transitions. [2021-07-13 19:50:15,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2748 transitions. [2021-07-13 19:50:15,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:15,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:15,466 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:15,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5484 [2021-07-13 19:50:15,666 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:15,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1528251096, now seen corresponding path program 503 times [2021-07-13 19:50:15,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:15,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848533057] [2021-07-13 19:50:15,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:15,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:15,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848533057] [2021-07-13 19:50:15,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848533057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:15,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206868668] [2021-07-13 19:50:15,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:15,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:15,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:15,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:15,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206868668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:15,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:15,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:15,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881568295] [2021-07-13 19:50:15,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:15,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:15,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:15,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:15,953 INFO L87 Difference]: Start difference. First operand 799 states and 2748 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:16,905 INFO L93 Difference]: Finished difference Result 1547 states and 4730 transitions. [2021-07-13 19:50:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:50:16,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:16,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:16,907 INFO L225 Difference]: With dead ends: 1547 [2021-07-13 19:50:16,908 INFO L226 Difference]: Without dead ends: 1547 [2021-07-13 19:50:16,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 847.7ms TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:50:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-07-13 19:50:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 793. [2021-07-13 19:50:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-07-13 19:50:16,921 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-07-13 19:50:16,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:16,921 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-07-13 19:50:16,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:16,921 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-07-13 19:50:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:16,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:16,922 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:17,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5489,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:17,122 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash -641746940, now seen corresponding path program 504 times [2021-07-13 19:50:17,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:17,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949616986] [2021-07-13 19:50:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:17,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949616986] [2021-07-13 19:50:17,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949616986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:17,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407103983] [2021-07-13 19:50:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:17,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:17,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:17,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:17,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:17,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407103983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:17,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:17,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315175524] [2021-07-13 19:50:17,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:17,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:17,485 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:18,180 INFO L93 Difference]: Finished difference Result 1317 states and 4151 transitions. [2021-07-13 19:50:18,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:18,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:18,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:18,183 INFO L225 Difference]: With dead ends: 1317 [2021-07-13 19:50:18,183 INFO L226 Difference]: Without dead ends: 1303 [2021-07-13 19:50:18,183 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:18,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-07-13 19:50:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 793. [2021-07-13 19:50:18,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-07-13 19:50:18,195 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-07-13 19:50:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:18,195 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-07-13 19:50:18,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-07-13 19:50:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:18,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:18,196 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:18,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5497 [2021-07-13 19:50:18,406 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1656497320, now seen corresponding path program 505 times [2021-07-13 19:50:18,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:18,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345270616] [2021-07-13 19:50:18,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345270616] [2021-07-13 19:50:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345270616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115961490] [2021-07-13 19:50:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:18,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115961490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:18,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:18,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:18,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336887569] [2021-07-13 19:50:18,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:18,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:18,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:18,687 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:19,157 INFO L93 Difference]: Finished difference Result 1362 states and 4275 transitions. [2021-07-13 19:50:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:19,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:19,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:19,160 INFO L225 Difference]: With dead ends: 1362 [2021-07-13 19:50:19,160 INFO L226 Difference]: Without dead ends: 1362 [2021-07-13 19:50:19,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-07-13 19:50:19,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 796. [2021-07-13 19:50:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.4515723270440253) internal successors, (2744), 795 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2744 transitions. [2021-07-13 19:50:19,172 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2744 transitions. Word has length 20 [2021-07-13 19:50:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:19,172 INFO L482 AbstractCegarLoop]: Abstraction has 796 states and 2744 transitions. [2021-07-13 19:50:19,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2744 transitions. [2021-07-13 19:50:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:19,173 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:19,173 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:19,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5506,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:19,374 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:19,374 INFO L82 PathProgramCache]: Analyzing trace with hash -473731240, now seen corresponding path program 506 times [2021-07-13 19:50:19,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:19,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695522161] [2021-07-13 19:50:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:19,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:19,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695522161] [2021-07-13 19:50:19,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695522161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:19,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615521849] [2021-07-13 19:50:19,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:19,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:19,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:19,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615521849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:19,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:19,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:19,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892876915] [2021-07-13 19:50:19,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:19,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:19,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:19,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:19,662 INFO L87 Difference]: Start difference. First operand 796 states and 2744 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:20,238 INFO L93 Difference]: Finished difference Result 1393 states and 4360 transitions. [2021-07-13 19:50:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:50:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:20,240 INFO L225 Difference]: With dead ends: 1393 [2021-07-13 19:50:20,240 INFO L226 Difference]: Without dead ends: 1393 [2021-07-13 19:50:20,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:50:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-07-13 19:50:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 797. [2021-07-13 19:50:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 797 states, 796 states have (on average 3.4547738693467336) internal successors, (2750), 796 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 797 states to 797 states and 2750 transitions. [2021-07-13 19:50:20,252 INFO L78 Accepts]: Start accepts. Automaton has 797 states and 2750 transitions. Word has length 20 [2021-07-13 19:50:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:20,253 INFO L482 AbstractCegarLoop]: Abstraction has 797 states and 2750 transitions. [2021-07-13 19:50:20,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 797 states and 2750 transitions. [2021-07-13 19:50:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:20,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:20,254 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:20,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5510,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:20,454 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:20,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:20,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1864099100, now seen corresponding path program 507 times [2021-07-13 19:50:20,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:20,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403207482] [2021-07-13 19:50:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:20,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:20,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403207482] [2021-07-13 19:50:20,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403207482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:20,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434023605] [2021-07-13 19:50:20,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:20,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:20,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:20,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434023605] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:20,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:20,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:20,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844358742] [2021-07-13 19:50:20,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:20,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:20,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:20,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:20,746 INFO L87 Difference]: Start difference. First operand 797 states and 2750 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:21,206 INFO L93 Difference]: Finished difference Result 1350 states and 4257 transitions. [2021-07-13 19:50:21,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:21,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:21,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:21,208 INFO L225 Difference]: With dead ends: 1350 [2021-07-13 19:50:21,208 INFO L226 Difference]: Without dead ends: 1350 [2021-07-13 19:50:21,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:21,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1350 states. [2021-07-13 19:50:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1350 to 793. [2021-07-13 19:50:21,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4457070707070705) internal successors, (2729), 792 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2729 transitions. [2021-07-13 19:50:21,222 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2729 transitions. Word has length 20 [2021-07-13 19:50:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:21,222 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2729 transitions. [2021-07-13 19:50:21,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2729 transitions. [2021-07-13 19:50:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:21,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:21,223 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:21,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5517 [2021-07-13 19:50:21,428 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1335697110, now seen corresponding path program 508 times [2021-07-13 19:50:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:21,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648452091] [2021-07-13 19:50:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:21,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648452091] [2021-07-13 19:50:21,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648452091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:21,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189830378] [2021-07-13 19:50:21,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:21,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:21,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:21,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189830378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:21,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:21,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:21,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933420953] [2021-07-13 19:50:21,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:21,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:21,713 INFO L87 Difference]: Start difference. First operand 793 states and 2729 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:22,853 INFO L93 Difference]: Finished difference Result 1614 states and 4881 transitions. [2021-07-13 19:50:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:50:22,854 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:22,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:22,856 INFO L225 Difference]: With dead ends: 1614 [2021-07-13 19:50:22,856 INFO L226 Difference]: Without dead ends: 1614 [2021-07-13 19:50:22,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:50:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-13 19:50:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 795. [2021-07-13 19:50:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.452141057934509) internal successors, (2741), 794 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2741 transitions. [2021-07-13 19:50:22,870 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2741 transitions. Word has length 20 [2021-07-13 19:50:22,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:22,870 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2741 transitions. [2021-07-13 19:50:22,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:22,870 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2741 transitions. [2021-07-13 19:50:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:22,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:22,871 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:23,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5524,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:23,072 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1647343268, now seen corresponding path program 509 times [2021-07-13 19:50:23,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:23,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229840268] [2021-07-13 19:50:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:23,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:23,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229840268] [2021-07-13 19:50:23,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229840268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:23,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395755136] [2021-07-13 19:50:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:23,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:23,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:23,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395755136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:23,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:23,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:23,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901620733] [2021-07-13 19:50:23,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:23,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:23,440 INFO L87 Difference]: Start difference. First operand 795 states and 2741 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:24,241 INFO L93 Difference]: Finished difference Result 1340 states and 4219 transitions. [2021-07-13 19:50:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:24,244 INFO L225 Difference]: With dead ends: 1340 [2021-07-13 19:50:24,244 INFO L226 Difference]: Without dead ends: 1340 [2021-07-13 19:50:24,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 831.1ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2021-07-13 19:50:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 798. [2021-07-13 19:50:24,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-07-13 19:50:24,256 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-07-13 19:50:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:24,256 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-07-13 19:50:24,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-07-13 19:50:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:24,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:24,257 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:24,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5532,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:24,458 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -584296672, now seen corresponding path program 510 times [2021-07-13 19:50:24,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:24,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723262319] [2021-07-13 19:50:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:24,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723262319] [2021-07-13 19:50:24,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723262319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276829162] [2021-07-13 19:50:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:24,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:24,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:24,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:24,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276829162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:24,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:24,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:24,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306179192] [2021-07-13 19:50:24,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:24,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:24,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:24,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:24,757 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:25,649 INFO L93 Difference]: Finished difference Result 1502 states and 4647 transitions. [2021-07-13 19:50:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:50:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:25,651 INFO L225 Difference]: With dead ends: 1502 [2021-07-13 19:50:25,651 INFO L226 Difference]: Without dead ends: 1502 [2021-07-13 19:50:25,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 820.7ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:50:25,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-07-13 19:50:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 799. [2021-07-13 19:50:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.4611528822055138) internal successors, (2762), 798 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2762 transitions. [2021-07-13 19:50:25,664 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2762 transitions. Word has length 20 [2021-07-13 19:50:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:25,664 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2762 transitions. [2021-07-13 19:50:25,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2762 transitions. [2021-07-13 19:50:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:25,665 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:25,665 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:25,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5541 [2021-07-13 19:50:25,865 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash 708045728, now seen corresponding path program 511 times [2021-07-13 19:50:25,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:25,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331952778] [2021-07-13 19:50:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:25,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331952778] [2021-07-13 19:50:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331952778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:25,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918441867] [2021-07-13 19:50:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:26,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:26,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:26,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918441867] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:26,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:26,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:26,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107232761] [2021-07-13 19:50:26,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:26,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:26,151 INFO L87 Difference]: Start difference. First operand 799 states and 2762 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:26,991 INFO L93 Difference]: Finished difference Result 1471 states and 4580 transitions. [2021-07-13 19:50:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:50:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:26,994 INFO L225 Difference]: With dead ends: 1471 [2021-07-13 19:50:26,994 INFO L226 Difference]: Without dead ends: 1471 [2021-07-13 19:50:26,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 749.0ms TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:50:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2021-07-13 19:50:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 798. [2021-07-13 19:50:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 797 states have (on average 3.4579673776662485) internal successors, (2756), 797 states have internal predecessors, (2756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 2756 transitions. [2021-07-13 19:50:27,006 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 2756 transitions. Word has length 20 [2021-07-13 19:50:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:27,006 INFO L482 AbstractCegarLoop]: Abstraction has 798 states and 2756 transitions. [2021-07-13 19:50:27,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 2756 transitions. [2021-07-13 19:50:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:27,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:27,007 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:27,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5548,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:27,208 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1815983226, now seen corresponding path program 512 times [2021-07-13 19:50:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694220705] [2021-07-13 19:50:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694220705] [2021-07-13 19:50:27,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694220705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758618855] [2021-07-13 19:50:27,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:27,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:27,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:27,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:27,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:27,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758618855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:27,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:27,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:27,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197177276] [2021-07-13 19:50:27,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:27,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:27,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:27,495 INFO L87 Difference]: Start difference. First operand 798 states and 2756 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:27,986 INFO L93 Difference]: Finished difference Result 1344 states and 4231 transitions. [2021-07-13 19:50:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:50:27,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:27,988 INFO L225 Difference]: With dead ends: 1344 [2021-07-13 19:50:27,988 INFO L226 Difference]: Without dead ends: 1344 [2021-07-13 19:50:27,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 433.5ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-13 19:50:27,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 800. [2021-07-13 19:50:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.460575719649562) internal successors, (2765), 799 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2765 transitions. [2021-07-13 19:50:28,000 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2765 transitions. Word has length 20 [2021-07-13 19:50:28,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:28,000 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2765 transitions. [2021-07-13 19:50:28,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:28,000 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2765 transitions. [2021-07-13 19:50:28,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:28,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:28,001 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:28,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5555,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:28,202 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:28,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:28,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1556371972, now seen corresponding path program 513 times [2021-07-13 19:50:28,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:28,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110124719] [2021-07-13 19:50:28,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:28,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110124719] [2021-07-13 19:50:28,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110124719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:28,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012221784] [2021-07-13 19:50:28,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:28,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:28,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:28,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:28,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:28,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012221784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:28,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:28,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:28,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943265511] [2021-07-13 19:50:28,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:28,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:28,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:28,569 INFO L87 Difference]: Start difference. First operand 800 states and 2765 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:29,109 INFO L93 Difference]: Finished difference Result 1282 states and 4102 transitions. [2021-07-13 19:50:29,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:29,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:29,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:29,112 INFO L225 Difference]: With dead ends: 1282 [2021-07-13 19:50:29,112 INFO L226 Difference]: Without dead ends: 1282 [2021-07-13 19:50:29,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-07-13 19:50:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 793. [2021-07-13 19:50:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-07-13 19:50:29,124 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-07-13 19:50:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:29,124 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-07-13 19:50:29,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-07-13 19:50:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:29,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:29,125 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:29,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 542 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5563 [2021-07-13 19:50:29,325 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:29,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2131358622, now seen corresponding path program 514 times [2021-07-13 19:50:29,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:29,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845784181] [2021-07-13 19:50:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:29,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845784181] [2021-07-13 19:50:29,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845784181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:29,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853043917] [2021-07-13 19:50:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:29,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:29,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853043917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:29,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:29,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:29,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41510337] [2021-07-13 19:50:29,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:29,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:29,587 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:29,874 INFO L93 Difference]: Finished difference Result 1144 states and 3667 transitions. [2021-07-13 19:50:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:50:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:29,876 INFO L225 Difference]: With dead ends: 1144 [2021-07-13 19:50:29,877 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:50:29,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:50:29,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 793. [2021-07-13 19:50:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4393939393939394) internal successors, (2724), 792 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2724 transitions. [2021-07-13 19:50:29,887 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2724 transitions. Word has length 20 [2021-07-13 19:50:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:29,887 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2724 transitions. [2021-07-13 19:50:29,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2724 transitions. [2021-07-13 19:50:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:29,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:29,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:30,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5574 [2021-07-13 19:50:30,089 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash 285793542, now seen corresponding path program 515 times [2021-07-13 19:50:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:30,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453245832] [2021-07-13 19:50:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:30,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453245832] [2021-07-13 19:50:30,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453245832] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:30,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51820641] [2021-07-13 19:50:30,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:30,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:30,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51820641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:30,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:30,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257742578] [2021-07-13 19:50:30,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:30,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:30,377 INFO L87 Difference]: Start difference. First operand 793 states and 2724 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:30,734 INFO L93 Difference]: Finished difference Result 1168 states and 3711 transitions. [2021-07-13 19:50:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:30,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:30,736 INFO L225 Difference]: With dead ends: 1168 [2021-07-13 19:50:30,736 INFO L226 Difference]: Without dead ends: 1154 [2021-07-13 19:50:30,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-07-13 19:50:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 795. [2021-07-13 19:50:30,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.4395465994962215) internal successors, (2731), 794 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2731 transitions. [2021-07-13 19:50:30,747 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2731 transitions. Word has length 20 [2021-07-13 19:50:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:30,747 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 2731 transitions. [2021-07-13 19:50:30,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2731 transitions. [2021-07-13 19:50:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:30,748 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:30,748 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:30,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5580,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:30,949 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2011600566, now seen corresponding path program 516 times [2021-07-13 19:50:30,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:30,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084396645] [2021-07-13 19:50:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084396645] [2021-07-13 19:50:31,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084396645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553699361] [2021-07-13 19:50:31,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:31,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:31,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:31,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:31,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553699361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:31,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:31,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:31,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239215301] [2021-07-13 19:50:31,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:31,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:31,319 INFO L87 Difference]: Start difference. First operand 795 states and 2731 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:31,897 INFO L93 Difference]: Finished difference Result 1193 states and 3763 transitions. [2021-07-13 19:50:31,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:31,898 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:31,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:31,900 INFO L225 Difference]: With dead ends: 1193 [2021-07-13 19:50:31,900 INFO L226 Difference]: Without dead ends: 1186 [2021-07-13 19:50:31,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:31,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-13 19:50:31,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 806. [2021-07-13 19:50:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.4285714285714284) internal successors, (2760), 805 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2760 transitions. [2021-07-13 19:50:31,911 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2760 transitions. Word has length 20 [2021-07-13 19:50:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:31,911 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2760 transitions. [2021-07-13 19:50:31,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2760 transitions. [2021-07-13 19:50:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:31,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:31,912 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:32,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5586 [2021-07-13 19:50:32,113 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1516520582, now seen corresponding path program 517 times [2021-07-13 19:50:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713722588] [2021-07-13 19:50:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:32,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713722588] [2021-07-13 19:50:32,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713722588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881457695] [2021-07-13 19:50:32,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:32,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881457695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:32,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:32,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:32,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514282535] [2021-07-13 19:50:32,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:32,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:32,404 INFO L87 Difference]: Start difference. First operand 806 states and 2760 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:32,767 INFO L93 Difference]: Finished difference Result 1133 states and 3652 transitions. [2021-07-13 19:50:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:32,769 INFO L225 Difference]: With dead ends: 1133 [2021-07-13 19:50:32,769 INFO L226 Difference]: Without dead ends: 1133 [2021-07-13 19:50:32,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-07-13 19:50:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 789. [2021-07-13 19:50:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.4441624365482233) internal successors, (2714), 788 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2714 transitions. [2021-07-13 19:50:32,780 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2714 transitions. Word has length 20 [2021-07-13 19:50:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:32,780 INFO L482 AbstractCegarLoop]: Abstraction has 789 states and 2714 transitions. [2021-07-13 19:50:32,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2714 transitions. [2021-07-13 19:50:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:32,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:32,781 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:32,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5594 [2021-07-13 19:50:32,982 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash -284214296, now seen corresponding path program 518 times [2021-07-13 19:50:32,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:32,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525262267] [2021-07-13 19:50:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:33,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525262267] [2021-07-13 19:50:33,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525262267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378107170] [2021-07-13 19:50:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:33,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:33,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:33,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378107170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:33,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:33,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074400868] [2021-07-13 19:50:33,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:33,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:33,254 INFO L87 Difference]: Start difference. First operand 789 states and 2714 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:33,626 INFO L93 Difference]: Finished difference Result 1125 states and 3613 transitions. [2021-07-13 19:50:33,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:33,626 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:33,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:33,628 INFO L225 Difference]: With dead ends: 1125 [2021-07-13 19:50:33,628 INFO L226 Difference]: Without dead ends: 1111 [2021-07-13 19:50:33,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 330.7ms TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-07-13 19:50:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 793. [2021-07-13 19:50:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4444444444444446) internal successors, (2728), 792 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2728 transitions. [2021-07-13 19:50:33,639 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2728 transitions. Word has length 20 [2021-07-13 19:50:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:33,639 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2728 transitions. [2021-07-13 19:50:33,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:33,639 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2728 transitions. [2021-07-13 19:50:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:33,640 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:33,640 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:33,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5599,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:33,841 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1713358892, now seen corresponding path program 519 times [2021-07-13 19:50:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:33,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679580943] [2021-07-13 19:50:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:33,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:33,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679580943] [2021-07-13 19:50:33,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679580943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:33,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386945899] [2021-07-13 19:50:33,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:34,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:34,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:34,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386945899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:34,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:34,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736360088] [2021-07-13 19:50:34,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:34,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:34,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:34,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:34,115 INFO L87 Difference]: Start difference. First operand 793 states and 2728 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:34,501 INFO L93 Difference]: Finished difference Result 1150 states and 3665 transitions. [2021-07-13 19:50:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:34,503 INFO L225 Difference]: With dead ends: 1150 [2021-07-13 19:50:34,503 INFO L226 Difference]: Without dead ends: 1143 [2021-07-13 19:50:34,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-07-13 19:50:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 804. [2021-07-13 19:50:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-07-13 19:50:34,514 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-07-13 19:50:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:34,514 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-07-13 19:50:34,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-07-13 19:50:34,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:34,515 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:34,515 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:34,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5606 [2021-07-13 19:50:34,716 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash 946512744, now seen corresponding path program 520 times [2021-07-13 19:50:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:34,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023447426] [2021-07-13 19:50:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:34,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:34,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023447426] [2021-07-13 19:50:34,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023447426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786066459] [2021-07-13 19:50:34,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:34,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:34,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786066459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:34,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:34,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:34,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362505165] [2021-07-13 19:50:34,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:34,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:34,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:34,995 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:35,336 INFO L93 Difference]: Finished difference Result 1152 states and 3670 transitions. [2021-07-13 19:50:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:35,338 INFO L225 Difference]: With dead ends: 1152 [2021-07-13 19:50:35,338 INFO L226 Difference]: Without dead ends: 1152 [2021-07-13 19:50:35,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-07-13 19:50:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 791. [2021-07-13 19:50:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-07-13 19:50:35,349 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-07-13 19:50:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:35,349 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-07-13 19:50:35,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-07-13 19:50:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:35,350 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:35,350 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:35,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5611,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,550 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:35,551 INFO L82 PathProgramCache]: Analyzing trace with hash -501136808, now seen corresponding path program 521 times [2021-07-13 19:50:35,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:35,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042101141] [2021-07-13 19:50:35,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:35,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042101141] [2021-07-13 19:50:35,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042101141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:35,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166131232] [2021-07-13 19:50:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:35,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:35,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:35,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:35,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:35,781 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:35,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:35,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:35,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:35,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:35,786 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:22, output treesize:6 [2021-07-13 19:50:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:35,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166131232] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:35,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:35,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:35,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280379304] [2021-07-13 19:50:35,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:35,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:35,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:35,823 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:36,133 INFO L93 Difference]: Finished difference Result 1219 states and 3829 transitions. [2021-07-13 19:50:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:50:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:36,136 INFO L225 Difference]: With dead ends: 1219 [2021-07-13 19:50:36,136 INFO L226 Difference]: Without dead ends: 1212 [2021-07-13 19:50:36,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:50:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-07-13 19:50:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 806. [2021-07-13 19:50:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.431055900621118) internal successors, (2762), 805 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2762 transitions. [2021-07-13 19:50:36,148 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2762 transitions. Word has length 20 [2021-07-13 19:50:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:36,148 INFO L482 AbstractCegarLoop]: Abstraction has 806 states and 2762 transitions. [2021-07-13 19:50:36,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,148 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2762 transitions. [2021-07-13 19:50:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:36,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:36,150 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:36,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5617 [2021-07-13 19:50:36,350 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1267982956, now seen corresponding path program 522 times [2021-07-13 19:50:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:36,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285255204] [2021-07-13 19:50:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:36,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:36,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285255204] [2021-07-13 19:50:36,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285255204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:36,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086250269] [2021-07-13 19:50:36,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:36,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:36,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:36,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:36,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:36,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:36,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:36,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:36,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:36,593 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-13 19:50:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:36,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086250269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:36,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:36,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:36,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605091301] [2021-07-13 19:50:36,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:36,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:36,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:36,617 INFO L87 Difference]: Start difference. First operand 806 states and 2762 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:36,977 INFO L93 Difference]: Finished difference Result 1247 states and 3888 transitions. [2021-07-13 19:50:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:50:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:36,979 INFO L225 Difference]: With dead ends: 1247 [2021-07-13 19:50:36,979 INFO L226 Difference]: Without dead ends: 1247 [2021-07-13 19:50:36,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:50:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-07-13 19:50:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 804. [2021-07-13 19:50:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.4333748443337484) internal successors, (2757), 803 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2757 transitions. [2021-07-13 19:50:36,992 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2757 transitions. Word has length 20 [2021-07-13 19:50:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:36,992 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2757 transitions. [2021-07-13 19:50:36,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2757 transitions. [2021-07-13 19:50:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:36,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:36,994 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:37,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5624,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:37,200 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash -92492312, now seen corresponding path program 523 times [2021-07-13 19:50:37,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:37,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70358218] [2021-07-13 19:50:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:37,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:37,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70358218] [2021-07-13 19:50:37,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70358218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:37,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925941811] [2021-07-13 19:50:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:37,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:37,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:37,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:37,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-07-13 19:50:37,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:37,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:50:37,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:37,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:21, output treesize:6 [2021-07-13 19:50:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:37,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925941811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:37,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:37,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:50:37,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372354369] [2021-07-13 19:50:37,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:50:37,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:37,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:50:37,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:37,449 INFO L87 Difference]: Start difference. First operand 804 states and 2757 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:37,710 INFO L93 Difference]: Finished difference Result 1188 states and 3774 transitions. [2021-07-13 19:50:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:37,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:37,712 INFO L225 Difference]: With dead ends: 1188 [2021-07-13 19:50:37,712 INFO L226 Difference]: Without dead ends: 1188 [2021-07-13 19:50:37,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-07-13 19:50:37,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 791. [2021-07-13 19:50:37,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 790 states have (on average 3.4443037974683546) internal successors, (2721), 790 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 2721 transitions. [2021-07-13 19:50:37,723 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 2721 transitions. Word has length 20 [2021-07-13 19:50:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:37,723 INFO L482 AbstractCegarLoop]: Abstraction has 791 states and 2721 transitions. [2021-07-13 19:50:37,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:37,724 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 2721 transitions. [2021-07-13 19:50:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:37,725 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:37,725 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:37,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5633,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:37,925 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:37,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash 167624360, now seen corresponding path program 524 times [2021-07-13 19:50:37,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:37,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326031330] [2021-07-13 19:50:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:37,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:37,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326031330] [2021-07-13 19:50:37,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326031330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:37,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615330126] [2021-07-13 19:50:37,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:38,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:38,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615330126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:38,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:50:38,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144012254] [2021-07-13 19:50:38,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:50:38,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:38,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:50:38,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:50:38,159 INFO L87 Difference]: Start difference. First operand 791 states and 2721 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:38,369 INFO L93 Difference]: Finished difference Result 1189 states and 3834 transitions. [2021-07-13 19:50:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:38,369 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:38,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:38,371 INFO L225 Difference]: With dead ends: 1189 [2021-07-13 19:50:38,371 INFO L226 Difference]: Without dead ends: 1189 [2021-07-13 19:50:38,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:38,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-07-13 19:50:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 786. [2021-07-13 19:50:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 785 states have (on average 3.443312101910828) internal successors, (2703), 785 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2703 transitions. [2021-07-13 19:50:38,382 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2703 transitions. Word has length 20 [2021-07-13 19:50:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:38,382 INFO L482 AbstractCegarLoop]: Abstraction has 786 states and 2703 transitions. [2021-07-13 19:50:38,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2703 transitions. [2021-07-13 19:50:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:38,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:38,384 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:38,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5640 [2021-07-13 19:50:38,585 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:38,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash -747390040, now seen corresponding path program 525 times [2021-07-13 19:50:38,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:38,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856500633] [2021-07-13 19:50:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856500633] [2021-07-13 19:50:38,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856500633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058443431] [2021-07-13 19:50:38,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:38,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:38,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:38,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:38,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058443431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:38,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:38,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:38,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160562044] [2021-07-13 19:50:38,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:38,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:38,842 INFO L87 Difference]: Start difference. First operand 786 states and 2703 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:39,032 INFO L93 Difference]: Finished difference Result 1178 states and 3806 transitions. [2021-07-13 19:50:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:39,034 INFO L225 Difference]: With dead ends: 1178 [2021-07-13 19:50:39,034 INFO L226 Difference]: Without dead ends: 1178 [2021-07-13 19:50:39,035 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-07-13 19:50:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 785. [2021-07-13 19:50:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 3.44515306122449) internal successors, (2701), 784 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2701 transitions. [2021-07-13 19:50:39,046 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2701 transitions. Word has length 20 [2021-07-13 19:50:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:39,046 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2701 transitions. [2021-07-13 19:50:39,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2701 transitions. [2021-07-13 19:50:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:39,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:39,047 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:39,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5643,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:39,247 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:39,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1514236188, now seen corresponding path program 526 times [2021-07-13 19:50:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:39,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720350808] [2021-07-13 19:50:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:39,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:39,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:39,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720350808] [2021-07-13 19:50:39,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720350808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:39,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152712612] [2021-07-13 19:50:39,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:39,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:39,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:39,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152712612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:39,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:39,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:39,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974259642] [2021-07-13 19:50:39,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:39,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:39,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:39,511 INFO L87 Difference]: Start difference. First operand 785 states and 2701 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:39,713 INFO L93 Difference]: Finished difference Result 1203 states and 3862 transitions. [2021-07-13 19:50:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:39,713 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:39,715 INFO L225 Difference]: With dead ends: 1203 [2021-07-13 19:50:39,715 INFO L226 Difference]: Without dead ends: 1203 [2021-07-13 19:50:39,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-07-13 19:50:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 782. [2021-07-13 19:50:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-07-13 19:50:39,727 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-07-13 19:50:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:39,727 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-07-13 19:50:39,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:39,728 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-07-13 19:50:39,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:39,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:39,729 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5647,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:39,929 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash 823594152, now seen corresponding path program 527 times [2021-07-13 19:50:39,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:39,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894757363] [2021-07-13 19:50:39,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:40,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894757363] [2021-07-13 19:50:40,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894757363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944440236] [2021-07-13 19:50:40,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:40,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:40,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:40,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:40,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944440236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:40,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:40,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398712654] [2021-07-13 19:50:40,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:40,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:40,237 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:40,440 INFO L93 Difference]: Finished difference Result 1160 states and 3759 transitions. [2021-07-13 19:50:40,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:40,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:40,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:40,442 INFO L225 Difference]: With dead ends: 1160 [2021-07-13 19:50:40,442 INFO L226 Difference]: Without dead ends: 1160 [2021-07-13 19:50:40,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:50:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-07-13 19:50:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 770. [2021-07-13 19:50:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 3.423927178153446) internal successors, (2633), 769 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 2633 transitions. [2021-07-13 19:50:40,453 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 2633 transitions. Word has length 20 [2021-07-13 19:50:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:40,453 INFO L482 AbstractCegarLoop]: Abstraction has 770 states and 2633 transitions. [2021-07-13 19:50:40,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 2633 transitions. [2021-07-13 19:50:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:40,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:40,454 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:40,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5652 [2021-07-13 19:50:40,654 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:40,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:40,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2052769820, now seen corresponding path program 528 times [2021-07-13 19:50:40,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:40,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944708500] [2021-07-13 19:50:40,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:40,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944708500] [2021-07-13 19:50:40,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944708500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536024904] [2021-07-13 19:50:40,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:40,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:40,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536024904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:40,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:40,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:40,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347314658] [2021-07-13 19:50:40,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:40,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:40,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:40,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:40,907 INFO L87 Difference]: Start difference. First operand 770 states and 2633 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:41,071 INFO L93 Difference]: Finished difference Result 1138 states and 3676 transitions. [2021-07-13 19:50:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:41,073 INFO L225 Difference]: With dead ends: 1138 [2021-07-13 19:50:41,073 INFO L226 Difference]: Without dead ends: 1138 [2021-07-13 19:50:41,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-07-13 19:50:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 776. [2021-07-13 19:50:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.432258064516129) internal successors, (2660), 775 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2660 transitions. [2021-07-13 19:50:41,083 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2660 transitions. Word has length 20 [2021-07-13 19:50:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:41,084 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2660 transitions. [2021-07-13 19:50:41,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,084 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2660 transitions. [2021-07-13 19:50:41,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:41,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:41,085 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:41,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5658,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:41,285 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:41,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:41,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1285923672, now seen corresponding path program 529 times [2021-07-13 19:50:41,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:41,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941634962] [2021-07-13 19:50:41,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:41,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:41,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941634962] [2021-07-13 19:50:41,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941634962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:41,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352723266] [2021-07-13 19:50:41,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:41,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:41,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352723266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:41,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:41,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:41,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850762835] [2021-07-13 19:50:41,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:41,539 INFO L87 Difference]: Start difference. First operand 776 states and 2660 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:41,743 INFO L93 Difference]: Finished difference Result 1180 states and 3783 transitions. [2021-07-13 19:50:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:41,745 INFO L225 Difference]: With dead ends: 1180 [2021-07-13 19:50:41,745 INFO L226 Difference]: Without dead ends: 1180 [2021-07-13 19:50:41,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-07-13 19:50:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 777. [2021-07-13 19:50:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.435567010309278) internal successors, (2666), 776 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2666 transitions. [2021-07-13 19:50:41,756 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2666 transitions. Word has length 20 [2021-07-13 19:50:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:41,756 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2666 transitions. [2021-07-13 19:50:41,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2666 transitions. [2021-07-13 19:50:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:41,757 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:41,757 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:41,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5662 [2021-07-13 19:50:41,957 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -671213284, now seen corresponding path program 530 times [2021-07-13 19:50:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:41,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686077366] [2021-07-13 19:50:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686077366] [2021-07-13 19:50:42,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686077366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088789613] [2021-07-13 19:50:42,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:42,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088789613] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:42,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060602977] [2021-07-13 19:50:42,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:42,223 INFO L87 Difference]: Start difference. First operand 777 states and 2666 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:42,418 INFO L93 Difference]: Finished difference Result 1147 states and 3706 transitions. [2021-07-13 19:50:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:42,421 INFO L225 Difference]: With dead ends: 1147 [2021-07-13 19:50:42,421 INFO L226 Difference]: Without dead ends: 1147 [2021-07-13 19:50:42,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-07-13 19:50:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 773. [2021-07-13 19:50:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-07-13 19:50:42,431 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-07-13 19:50:42,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:42,431 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-07-13 19:50:42,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:42,431 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-07-13 19:50:42,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:42,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:42,432 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:42,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5667 [2021-07-13 19:50:42,633 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:42,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:42,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1833552980, now seen corresponding path program 531 times [2021-07-13 19:50:42,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:42,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957271884] [2021-07-13 19:50:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:42,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:42,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957271884] [2021-07-13 19:50:42,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957271884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181995744] [2021-07-13 19:50:42,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:42,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:42,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:42,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:42,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:42,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:42,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:42,866 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:50:42,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:42,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:50:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181995744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:42,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:42,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:42,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347955549] [2021-07-13 19:50:42,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:42,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:42,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:42,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:42,918 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:43,138 INFO L93 Difference]: Finished difference Result 1239 states and 3955 transitions. [2021-07-13 19:50:43,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:43,138 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:43,140 INFO L225 Difference]: With dead ends: 1239 [2021-07-13 19:50:43,140 INFO L226 Difference]: Without dead ends: 1239 [2021-07-13 19:50:43,140 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:43,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-07-13 19:50:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 777. [2021-07-13 19:50:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.431701030927835) internal successors, (2663), 776 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2663 transitions. [2021-07-13 19:50:43,152 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2663 transitions. Word has length 20 [2021-07-13 19:50:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:43,152 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 2663 transitions. [2021-07-13 19:50:43,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2663 transitions. [2021-07-13 19:50:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:43,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:43,153 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:43,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5673 [2021-07-13 19:50:43,353 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:43,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:43,354 INFO L82 PathProgramCache]: Analyzing trace with hash 504277360, now seen corresponding path program 532 times [2021-07-13 19:50:43,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:43,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170356793] [2021-07-13 19:50:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:43,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:43,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170356793] [2021-07-13 19:50:43,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170356793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:43,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992507827] [2021-07-13 19:50:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:43,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:43,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:43,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:43,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:43,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:43,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:43,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:43,575 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:43,589 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:50:43,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:43,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:50:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:43,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992507827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:43,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:43,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116731328] [2021-07-13 19:50:43,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:43,642 INFO L87 Difference]: Start difference. First operand 777 states and 2663 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:43,878 INFO L93 Difference]: Finished difference Result 1245 states and 3970 transitions. [2021-07-13 19:50:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:43,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:43,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:43,880 INFO L225 Difference]: With dead ends: 1245 [2021-07-13 19:50:43,880 INFO L226 Difference]: Without dead ends: 1245 [2021-07-13 19:50:43,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:43,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-07-13 19:50:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 776. [2021-07-13 19:50:43,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.4283870967741934) internal successors, (2657), 775 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2657 transitions. [2021-07-13 19:50:43,891 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2657 transitions. Word has length 20 [2021-07-13 19:50:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:43,892 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2657 transitions. [2021-07-13 19:50:43,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2657 transitions. [2021-07-13 19:50:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:43,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:43,893 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:44,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5679,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,093 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2117844094, now seen corresponding path program 533 times [2021-07-13 19:50:44,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:44,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543016332] [2021-07-13 19:50:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:44,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:44,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543016332] [2021-07-13 19:50:44,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543016332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:44,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362871845] [2021-07-13 19:50:44,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:44,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:44,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:44,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-07-13 19:50:44,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:44,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-07-13 19:50:44,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-13 19:50:44,333 INFO L628 ElimStorePlain]: treesize reduction 1, result has 93.8 percent of original size [2021-07-13 19:50:44,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-13 19:50:44,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:35, output treesize:15 [2021-07-13 19:50:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:44,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362871845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:44,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:44,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:50:44,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047577151] [2021-07-13 19:50:44,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:50:44,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:50:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:50:44,367 INFO L87 Difference]: Start difference. First operand 776 states and 2657 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:44,552 INFO L93 Difference]: Finished difference Result 1203 states and 3863 transitions. [2021-07-13 19:50:44,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:50:44,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:44,554 INFO L225 Difference]: With dead ends: 1203 [2021-07-13 19:50:44,554 INFO L226 Difference]: Without dead ends: 1203 [2021-07-13 19:50:44,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:50:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-07-13 19:50:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 773. [2021-07-13 19:50:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 772 states have (on average 3.4261658031088085) internal successors, (2645), 772 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 2645 transitions. [2021-07-13 19:50:44,565 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 2645 transitions. Word has length 20 [2021-07-13 19:50:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:44,565 INFO L482 AbstractCegarLoop]: Abstraction has 773 states and 2645 transitions. [2021-07-13 19:50:44,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 2645 transitions. [2021-07-13 19:50:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:44,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:44,567 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:44,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5687,562 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,767 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:44,768 INFO L82 PathProgramCache]: Analyzing trace with hash -255092834, now seen corresponding path program 534 times [2021-07-13 19:50:44,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:44,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74560416] [2021-07-13 19:50:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:44,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:44,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74560416] [2021-07-13 19:50:44,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74560416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:44,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496023953] [2021-07-13 19:50:44,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:44,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:44,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:44,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496023953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:45,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:45,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196929290] [2021-07-13 19:50:45,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:45,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:45,049 INFO L87 Difference]: Start difference. First operand 773 states and 2645 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:45,378 INFO L93 Difference]: Finished difference Result 1171 states and 3734 transitions. [2021-07-13 19:50:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:45,380 INFO L225 Difference]: With dead ends: 1171 [2021-07-13 19:50:45,380 INFO L226 Difference]: Without dead ends: 1171 [2021-07-13 19:50:45,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:50:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-07-13 19:50:45,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 781. [2021-07-13 19:50:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4294871794871793) internal successors, (2675), 780 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2675 transitions. [2021-07-13 19:50:45,391 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2675 transitions. Word has length 20 [2021-07-13 19:50:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:45,391 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2675 transitions. [2021-07-13 19:50:45,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:45,391 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2675 transitions. [2021-07-13 19:50:45,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:45,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:45,392 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:45,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5693 [2021-07-13 19:50:45,592 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash 453265384, now seen corresponding path program 535 times [2021-07-13 19:50:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:45,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315505573] [2021-07-13 19:50:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315505573] [2021-07-13 19:50:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315505573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140978265] [2021-07-13 19:50:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:45,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:45,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140978265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:45,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:45,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776450675] [2021-07-13 19:50:45,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:45,873 INFO L87 Difference]: Start difference. First operand 781 states and 2675 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:46,316 INFO L93 Difference]: Finished difference Result 1237 states and 3901 transitions. [2021-07-13 19:50:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:50:46,316 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:46,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:46,318 INFO L225 Difference]: With dead ends: 1237 [2021-07-13 19:50:46,318 INFO L226 Difference]: Without dead ends: 1237 [2021-07-13 19:50:46,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-07-13 19:50:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 781. [2021-07-13 19:50:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.437179487179487) internal successors, (2681), 780 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2681 transitions. [2021-07-13 19:50:46,338 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2681 transitions. Word has length 20 [2021-07-13 19:50:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:46,338 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2681 transitions. [2021-07-13 19:50:46,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2681 transitions. [2021-07-13 19:50:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:46,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:46,340 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:46,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5698,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:46,540 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1716732652, now seen corresponding path program 536 times [2021-07-13 19:50:46,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:46,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511532322] [2021-07-13 19:50:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:46,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:46,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511532322] [2021-07-13 19:50:46,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511532322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518660831] [2021-07-13 19:50:46,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:46,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:46,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:46,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:46,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:46,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518660831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:46,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:46,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:46,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222136543] [2021-07-13 19:50:46,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:46,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:46,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:46,892 INFO L87 Difference]: Start difference. First operand 781 states and 2681 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:47,186 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 19:50:47,493 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-07-13 19:50:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:47,541 INFO L93 Difference]: Finished difference Result 1192 states and 3776 transitions. [2021-07-13 19:50:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:50:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:47,543 INFO L225 Difference]: With dead ends: 1192 [2021-07-13 19:50:47,543 INFO L226 Difference]: Without dead ends: 1178 [2021-07-13 19:50:47,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:50:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-07-13 19:50:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 781. [2021-07-13 19:50:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.4346153846153844) internal successors, (2679), 780 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2679 transitions. [2021-07-13 19:50:47,554 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2679 transitions. Word has length 20 [2021-07-13 19:50:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:47,554 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2679 transitions. [2021-07-13 19:50:47,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2679 transitions. [2021-07-13 19:50:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:47,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:47,555 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:47,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5704,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:47,756 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:47,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2093035288, now seen corresponding path program 537 times [2021-07-13 19:50:47,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:47,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115058199] [2021-07-13 19:50:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:47,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:47,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115058199] [2021-07-13 19:50:47,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115058199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:47,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620301355] [2021-07-13 19:50:47,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:47,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:50:47,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:47,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:47,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620301355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:48,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:48,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351356860] [2021-07-13 19:50:48,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:48,107 INFO L87 Difference]: Start difference. First operand 781 states and 2679 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,395 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-07-13 19:50:48,624 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-07-13 19:50:48,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:48,709 INFO L93 Difference]: Finished difference Result 1243 states and 3905 transitions. [2021-07-13 19:50:48,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:48,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:48,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:48,711 INFO L225 Difference]: With dead ends: 1243 [2021-07-13 19:50:48,711 INFO L226 Difference]: Without dead ends: 1243 [2021-07-13 19:50:48,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 624.3ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:50:48,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2021-07-13 19:50:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 779. [2021-07-13 19:50:48,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-07-13 19:50:48,723 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-07-13 19:50:48,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:48,723 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-07-13 19:50:48,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-07-13 19:50:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:48,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:48,724 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,566 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:48,925 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1563484264, now seen corresponding path program 538 times [2021-07-13 19:50:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506709702] [2021-07-13 19:50:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:48,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:48,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506709702] [2021-07-13 19:50:48,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506709702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:48,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915859074] [2021-07-13 19:50:48,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:49,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:49,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915859074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:49,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:49,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764705278] [2021-07-13 19:50:49,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:49,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:49,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:49,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:49,209 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:49,543 INFO L93 Difference]: Finished difference Result 1287 states and 4035 transitions. [2021-07-13 19:50:49,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:49,545 INFO L225 Difference]: With dead ends: 1287 [2021-07-13 19:50:49,545 INFO L226 Difference]: Without dead ends: 1287 [2021-07-13 19:50:49,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-07-13 19:50:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 782. [2021-07-13 19:50:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.440460947503201) internal successors, (2687), 781 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2687 transitions. [2021-07-13 19:50:49,557 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2687 transitions. Word has length 20 [2021-07-13 19:50:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:49,557 INFO L482 AbstractCegarLoop]: Abstraction has 782 states and 2687 transitions. [2021-07-13 19:50:49,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2687 transitions. [2021-07-13 19:50:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:49,558 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:49,558 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:49,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5720,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:49,759 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:49,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:49,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1548716952, now seen corresponding path program 539 times [2021-07-13 19:50:49,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:49,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204324038] [2021-07-13 19:50:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:49,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:49,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204324038] [2021-07-13 19:50:49,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204324038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:49,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154978403] [2021-07-13 19:50:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:49,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154978403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:50,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:50,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605398389] [2021-07-13 19:50:50,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:50,059 INFO L87 Difference]: Start difference. First operand 782 states and 2687 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:50,423 INFO L93 Difference]: Finished difference Result 1318 states and 4120 transitions. [2021-07-13 19:50:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:50,423 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:50,425 INFO L225 Difference]: With dead ends: 1318 [2021-07-13 19:50:50,425 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 19:50:50,426 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 19:50:50,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 783. [2021-07-13 19:50:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.4437340153452687) internal successors, (2693), 782 states have internal predecessors, (2693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2693 transitions. [2021-07-13 19:50:50,437 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2693 transitions. Word has length 20 [2021-07-13 19:50:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:50,437 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 2693 transitions. [2021-07-13 19:50:50,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:50,438 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2693 transitions. [2021-07-13 19:50:50,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:50,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:50,439 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:50,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5724,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:50,639 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:50,639 INFO L82 PathProgramCache]: Analyzing trace with hash 789113388, now seen corresponding path program 540 times [2021-07-13 19:50:50,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:50,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640284183] [2021-07-13 19:50:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640284183] [2021-07-13 19:50:50,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640284183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112007518] [2021-07-13 19:50:50,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:50,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:50,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112007518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:50,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:50,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175608608] [2021-07-13 19:50:50,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:50,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:50,935 INFO L87 Difference]: Start difference. First operand 783 states and 2693 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:51,327 INFO L93 Difference]: Finished difference Result 1275 states and 4017 transitions. [2021-07-13 19:50:51,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:51,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:51,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:51,329 INFO L225 Difference]: With dead ends: 1275 [2021-07-13 19:50:51,329 INFO L226 Difference]: Without dead ends: 1275 [2021-07-13 19:50:51,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-07-13 19:50:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 779. [2021-07-13 19:50:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.4344473007712084) internal successors, (2672), 778 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2672 transitions. [2021-07-13 19:50:51,340 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2672 transitions. Word has length 20 [2021-07-13 19:50:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:51,340 INFO L482 AbstractCegarLoop]: Abstraction has 779 states and 2672 transitions. [2021-07-13 19:50:51,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2672 transitions. [2021-07-13 19:50:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:51,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:51,341 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:51,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5731,569 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:51,542 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:51,542 INFO L82 PathProgramCache]: Analyzing trace with hash 389872236, now seen corresponding path program 541 times [2021-07-13 19:50:51,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:51,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843405630] [2021-07-13 19:50:51,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:51,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843405630] [2021-07-13 19:50:51,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843405630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:51,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048221493] [2021-07-13 19:50:51,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:51,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048221493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:51,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:51,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368600624] [2021-07-13 19:50:51,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:51,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:51,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:51,943 INFO L87 Difference]: Start difference. First operand 779 states and 2672 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:52,773 INFO L93 Difference]: Finished difference Result 1376 states and 4195 transitions. [2021-07-13 19:50:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:50:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:52,775 INFO L225 Difference]: With dead ends: 1376 [2021-07-13 19:50:52,775 INFO L226 Difference]: Without dead ends: 1369 [2021-07-13 19:50:52,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 815.0ms TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:50:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-07-13 19:50:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 792. [2021-07-13 19:50:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4285714285714284) internal successors, (2712), 791 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2712 transitions. [2021-07-13 19:50:52,788 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2712 transitions. Word has length 20 [2021-07-13 19:50:52,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:52,788 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2712 transitions. [2021-07-13 19:50:52,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:52,788 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2712 transitions. [2021-07-13 19:50:52,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:52,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:52,789 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:52,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5737,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:52,990 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1884284474, now seen corresponding path program 542 times [2021-07-13 19:50:52,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:52,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703700181] [2021-07-13 19:50:52,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703700181] [2021-07-13 19:50:53,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703700181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666826155] [2021-07-13 19:50:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:53,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:53,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:53,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666826155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:53,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:53,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:53,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143816979] [2021-07-13 19:50:53,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:53,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:53,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:53,293 INFO L87 Difference]: Start difference. First operand 792 states and 2712 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:53,870 INFO L93 Difference]: Finished difference Result 1535 states and 4603 transitions. [2021-07-13 19:50:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:50:53,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:53,873 INFO L225 Difference]: With dead ends: 1535 [2021-07-13 19:50:53,873 INFO L226 Difference]: Without dead ends: 1535 [2021-07-13 19:50:53,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:50:53,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-07-13 19:50:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 793. [2021-07-13 19:50:53,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.4318181818181817) internal successors, (2718), 792 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2718 transitions. [2021-07-13 19:50:53,887 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2718 transitions. Word has length 20 [2021-07-13 19:50:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:53,887 INFO L482 AbstractCegarLoop]: Abstraction has 793 states and 2718 transitions. [2021-07-13 19:50:53,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2718 transitions. [2021-07-13 19:50:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:53,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:53,888 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5746 [2021-07-13 19:50:54,089 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,089 INFO L82 PathProgramCache]: Analyzing trace with hash 390376752, now seen corresponding path program 543 times [2021-07-13 19:50:54,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760102332] [2021-07-13 19:50:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760102332] [2021-07-13 19:50:54,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760102332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647872162] [2021-07-13 19:50:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:54,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:50:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:54,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:54,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647872162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:54,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:54,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268676599] [2021-07-13 19:50:54,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:54,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:54,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:54,383 INFO L87 Difference]: Start difference. First operand 793 states and 2718 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:54,684 INFO L93 Difference]: Finished difference Result 1298 states and 4047 transitions. [2021-07-13 19:50:54,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:54,686 INFO L225 Difference]: With dead ends: 1298 [2021-07-13 19:50:54,686 INFO L226 Difference]: Without dead ends: 1292 [2021-07-13 19:50:54,686 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:54,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-07-13 19:50:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 802. [2021-07-13 19:50:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.4232209737827715) internal successors, (2742), 801 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2742 transitions. [2021-07-13 19:50:54,699 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2742 transitions. Word has length 20 [2021-07-13 19:50:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:54,699 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2742 transitions. [2021-07-13 19:50:54,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2742 transitions. [2021-07-13 19:50:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:54,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:54,700 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:54,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5754,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:54,900 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1050566082, now seen corresponding path program 544 times [2021-07-13 19:50:54,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:54,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249199776] [2021-07-13 19:50:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:54,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249199776] [2021-07-13 19:50:54,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249199776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:54,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780530234] [2021-07-13 19:50:54,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:55,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:50:55,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:55,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:55,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:55,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780530234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:55,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:55,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:55,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604825517] [2021-07-13 19:50:55,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:55,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:55,254 INFO L87 Difference]: Start difference. First operand 802 states and 2742 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:55,845 INFO L93 Difference]: Finished difference Result 1326 states and 4108 transitions. [2021-07-13 19:50:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:50:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:55,848 INFO L225 Difference]: With dead ends: 1326 [2021-07-13 19:50:55,848 INFO L226 Difference]: Without dead ends: 1326 [2021-07-13 19:50:55,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 593.1ms TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:50:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-07-13 19:50:55,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 799. [2021-07-13 19:50:55,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.426065162907268) internal successors, (2734), 798 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2734 transitions. [2021-07-13 19:50:55,860 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2734 transitions. Word has length 20 [2021-07-13 19:50:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:55,860 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2734 transitions. [2021-07-13 19:50:55,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:55,860 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2734 transitions. [2021-07-13 19:50:55,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:55,861 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:55,861 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:56,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 573 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5761 [2021-07-13 19:50:56,062 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -795264508, now seen corresponding path program 545 times [2021-07-13 19:50:56,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:56,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514708397] [2021-07-13 19:50:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:56,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514708397] [2021-07-13 19:50:56,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514708397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063219997] [2021-07-13 19:50:56,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:56,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:56,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:56,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:56,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063219997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:56,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:56,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:56,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107487367] [2021-07-13 19:50:56,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:56,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:56,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:56,401 INFO L87 Difference]: Start difference. First operand 799 states and 2734 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:56,999 INFO L93 Difference]: Finished difference Result 1325 states and 4089 transitions. [2021-07-13 19:50:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:50:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:57,001 INFO L225 Difference]: With dead ends: 1325 [2021-07-13 19:50:57,001 INFO L226 Difference]: Without dead ends: 1318 [2021-07-13 19:50:57,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:50:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-07-13 19:50:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 803. [2021-07-13 19:50:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.42643391521197) internal successors, (2748), 802 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2748 transitions. [2021-07-13 19:50:57,014 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2748 transitions. Word has length 20 [2021-07-13 19:50:57,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:57,014 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2748 transitions. [2021-07-13 19:50:57,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:57,014 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2748 transitions. [2021-07-13 19:50:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:57,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:57,015 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:57,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-07-13 19:50:57,215 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:57,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:57,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1572638316, now seen corresponding path program 546 times [2021-07-13 19:50:57,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:57,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310708838] [2021-07-13 19:50:57,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:57,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310708838] [2021-07-13 19:50:57,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310708838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348285187] [2021-07-13 19:50:57,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:57,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:50:57,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:57,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:57,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:57,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348285187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:57,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:57,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:50:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079047882] [2021-07-13 19:50:57,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:50:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:50:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:50:57,580 INFO L87 Difference]: Start difference. First operand 803 states and 2748 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:58,154 INFO L93 Difference]: Finished difference Result 1347 states and 4164 transitions. [2021-07-13 19:50:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:50:58,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:58,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:58,156 INFO L225 Difference]: With dead ends: 1347 [2021-07-13 19:50:58,156 INFO L226 Difference]: Without dead ends: 1347 [2021-07-13 19:50:58,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 575.1ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:50:58,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-07-13 19:50:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 801. [2021-07-13 19:50:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-07-13 19:50:58,171 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-07-13 19:50:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:58,171 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-07-13 19:50:58,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-07-13 19:50:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:58,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:58,172 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:58,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5783 [2021-07-13 19:50:58,373 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1659282384, now seen corresponding path program 547 times [2021-07-13 19:50:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:58,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218556129] [2021-07-13 19:50:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:58,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:58,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:58,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218556129] [2021-07-13 19:50:58,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218556129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354270667] [2021-07-13 19:50:58,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:58,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:58,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:58,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354270667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:58,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:58,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:58,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109368893] [2021-07-13 19:50:58,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:58,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:58,670 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:50:59,130 INFO L93 Difference]: Finished difference Result 1485 states and 4530 transitions. [2021-07-13 19:50:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:50:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:50:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:50:59,133 INFO L225 Difference]: With dead ends: 1485 [2021-07-13 19:50:59,133 INFO L226 Difference]: Without dead ends: 1485 [2021-07-13 19:50:59,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:50:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1485 states. [2021-07-13 19:50:59,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1485 to 802. [2021-07-13 19:50:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.431960049937578) internal successors, (2749), 801 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2749 transitions. [2021-07-13 19:50:59,146 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2749 transitions. Word has length 20 [2021-07-13 19:50:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:50:59,146 INFO L482 AbstractCegarLoop]: Abstraction has 802 states and 2749 transitions. [2021-07-13 19:50:59,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:50:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2749 transitions. [2021-07-13 19:50:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:50:59,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:50:59,147 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:50:59,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5795 [2021-07-13 19:50:59,348 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:50:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:50:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash -366939984, now seen corresponding path program 548 times [2021-07-13 19:50:59,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:50:59,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186481201] [2021-07-13 19:50:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:50:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:50:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:50:59,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186481201] [2021-07-13 19:50:59,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186481201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691816222] [2021-07-13 19:50:59,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:50:59,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:50:59,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:50:59,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:50:59,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:50:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:50:59,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691816222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:50:59,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:50:59,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:50:59,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485592457] [2021-07-13 19:50:59,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:50:59,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:50:59,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:50:59,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:50:59,635 INFO L87 Difference]: Start difference. First operand 802 states and 2749 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:00,151 INFO L93 Difference]: Finished difference Result 1454 states and 4463 transitions. [2021-07-13 19:51:00,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:51:00,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:51:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:00,153 INFO L225 Difference]: With dead ends: 1454 [2021-07-13 19:51:00,153 INFO L226 Difference]: Without dead ends: 1454 [2021-07-13 19:51:00,154 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:51:00,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-07-13 19:51:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 801. [2021-07-13 19:51:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.42875) internal successors, (2743), 800 states have internal predecessors, (2743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2743 transitions. [2021-07-13 19:51:00,166 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2743 transitions. Word has length 20 [2021-07-13 19:51:00,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:00,167 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 2743 transitions. [2021-07-13 19:51:00,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2743 transitions. [2021-07-13 19:51:00,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:51:00,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:00,168 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:00,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5802,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:00,368 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1638545856, now seen corresponding path program 549 times [2021-07-13 19:51:00,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:00,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899776004] [2021-07-13 19:51:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:00,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:00,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899776004] [2021-07-13 19:51:00,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899776004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:00,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233976808] [2021-07-13 19:51:00,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:00,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:51:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:51:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:00,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233976808] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:00,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:00,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:51:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760239644] [2021-07-13 19:51:00,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:51:00,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:00,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:51:00,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:00,648 INFO L87 Difference]: Start difference. First operand 801 states and 2743 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:00,937 INFO L93 Difference]: Finished difference Result 1202 states and 3819 transitions. [2021-07-13 19:51:00,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:51:00,937 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:51:00,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:00,939 INFO L225 Difference]: With dead ends: 1202 [2021-07-13 19:51:00,939 INFO L226 Difference]: Without dead ends: 1196 [2021-07-13 19:51:00,939 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:51:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-07-13 19:51:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 805. [2021-07-13 19:51:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.4291044776119404) internal successors, (2757), 804 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2757 transitions. [2021-07-13 19:51:00,950 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2757 transitions. Word has length 20 [2021-07-13 19:51:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:00,951 INFO L482 AbstractCegarLoop]: Abstraction has 805 states and 2757 transitions. [2021-07-13 19:51:00,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:00,951 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2757 transitions. [2021-07-13 19:51:00,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:51:00,952 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:00,952 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:01,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:01,152 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:01,152 INFO L82 PathProgramCache]: Analyzing trace with hash 740997514, now seen corresponding path program 550 times [2021-07-13 19:51:01,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:01,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459627774] [2021-07-13 19:51:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:01,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459627774] [2021-07-13 19:51:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459627774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354992807] [2021-07-13 19:51:01,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:01,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:51:01,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:51:01,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:01,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354992807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:01,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:01,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:51:01,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409194661] [2021-07-13 19:51:01,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:51:01,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:51:01,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:51:01,437 INFO L87 Difference]: Start difference. First operand 805 states and 2757 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:02,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:02,110 INFO L93 Difference]: Finished difference Result 1526 states and 4597 transitions. [2021-07-13 19:51:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:51:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:51:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:02,113 INFO L225 Difference]: With dead ends: 1526 [2021-07-13 19:51:02,113 INFO L226 Difference]: Without dead ends: 1526 [2021-07-13 19:51:02,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:51:02,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-13 19:51:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 803. [2021-07-13 19:51:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.43142144638404) internal successors, (2752), 802 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:02,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2752 transitions. [2021-07-13 19:51:02,126 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2752 transitions. Word has length 20 [2021-07-13 19:51:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:02,126 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 2752 transitions. [2021-07-13 19:51:02,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2752 transitions. [2021-07-13 19:51:02,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:51:02,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:02,127 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:02,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5818,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,327 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:02,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1142951508, now seen corresponding path program 551 times [2021-07-13 19:51:02,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:02,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483600838] [2021-07-13 19:51:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:51:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:51:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483600838] [2021-07-13 19:51:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483600838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339882339] [2021-07-13 19:51:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:51:02,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:51:02,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:51:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 19:51:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:51:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:51:02,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339882339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:51:02,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:51:02,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-07-13 19:51:02,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751099171] [2021-07-13 19:51:02,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:51:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:51:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:51:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:51:02,683 INFO L87 Difference]: Start difference. First operand 803 states and 2752 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:51:03,106 INFO L93 Difference]: Finished difference Result 1288 states and 4026 transitions. [2021-07-13 19:51:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:51:03,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-13 19:51:03,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:51:03,109 INFO L225 Difference]: With dead ends: 1288 [2021-07-13 19:51:03,109 INFO L226 Difference]: Without dead ends: 1288 [2021-07-13 19:51:03,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:51:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-07-13 19:51:03,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 800. [2021-07-13 19:51:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.4267834793491865) internal successors, (2738), 799 states have internal predecessors, (2738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2738 transitions. [2021-07-13 19:51:03,121 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2738 transitions. Word has length 20 [2021-07-13 19:51:03,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:51:03,121 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2738 transitions. [2021-07-13 19:51:03,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:51:03,121 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2738 transitions. [2021-07-13 19:51:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-13 19:51:03,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:51:03,122 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:51:03,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5826 [2021-07-13 19:51:03,322 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:51:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:51:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 481386260, now seen corresponding path program 552 times [2021-07-13 19:51:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:51:03,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903457168] [2021-07-13 19:51:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:51:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-07-13 19:51:03,369 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-07-13 19:51:03,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5843 [2021-07-13 19:51:03,369 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:51:03,371 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:51:03,372 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:51:03,373 INFO L202 PluginConnector]: Adding new model name-comparator-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:51:03 BasicIcfg [2021-07-13 19:51:03,373 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:51:03,373 INFO L168 Benchmark]: Toolchain (without parser) took 786086.63 ms. Allocated memory was 202.4 MB in the beginning and 444.6 MB in the end (delta: 242.2 MB). Free memory was 181.9 MB in the beginning and 346.8 MB in the end (delta: -165.0 MB). Peak memory consumption was 77.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:03,373 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:51:03,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.90 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 180.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:03,373 INFO L168 Benchmark]: Boogie Preprocessor took 30.64 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 179.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:03,373 INFO L168 Benchmark]: RCFGBuilder took 517.71 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 183.5 MB in the end (delta: -4.4 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:03,374 INFO L168 Benchmark]: TraceAbstraction took 785503.74 ms. Allocated memory was 202.4 MB in the beginning and 444.6 MB in the end (delta: 242.2 MB). Free memory was 182.9 MB in the beginning and 346.8 MB in the end (delta: -163.9 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. [2021-07-13 19:51:03,374 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 202.4 MB. Free memory is still 183.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.90 ms. Allocated memory is still 202.4 MB. Free memory was 181.8 MB in the beginning and 180.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.64 ms. Allocated memory is still 202.4 MB. Free memory was 180.3 MB in the beginning and 179.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 517.71 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 183.5 MB in the end (delta: -4.4 MB). Peak memory consumption was 31.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 785503.74 ms. Allocated memory was 202.4 MB in the beginning and 444.6 MB in the end (delta: 242.2 MB). Free memory was 182.9 MB in the beginning and 346.8 MB in the end (delta: -163.9 MB). Peak memory consumption was 78.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 114]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 2,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 15 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 785397.7ms, OverallIterations: 719, TraceHistogramMax: 2, EmptinessCheckTime: 663.7ms, AutomataDifference: 417461.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 37032 SDtfs, 93117 SDslu, 210270 SDs, 0 SdLazy, 234074 SolverSat, 9343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 93953.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23931 GetRequests, 9716 SyntacticMatches, 177 SemanticMatches, 14038 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47833 ImplicationChecksByTransitivity, 417815.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=453, InterpolantAutomatonStates: 8448, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7151.1ms AutomataMinimizationTime, 718 MinimizatonAttempts, 226093 StatesRemovedByMinimization, 718 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3074.9ms SsaConstructionTime, 6757.1ms SatisfiabilityAnalysisTime, 190849.1ms InterpolantComputationTime, 25178 NumberOfCodeBlocks, 25178 NumberOfCodeBlocksAsserted, 1800 NumberOfCheckSat, 23881 ConstructedInterpolants, 0 QuantifiedInterpolants, 282072 SizeOfPredicates, 5835 NumberOfNonLiveVariables, 49860 ConjunctsInSsa, 13254 ConjunctsInUnsatCore, 1297 InterpolantComputations, 155 PerfectInterpolantSequences, 1364/3889 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown